Math Question: What is the sum of the prime factors of 1815?

To find the prime factors of 1815, we first divide it by the smallest prime number, which is 3. Doing so gives us 605 as the quotient. Continuing this process, we divide 605 by 5, yielding 121. Further division by 11 results in 11 as the quotient. Finally, dividing 11 by itself gives us 1. The prime factors are 3, 5, and 11. Adding them, we get 3 + 5 + 11 = 19. Therefore, the sum of the prime factors of 1815 is 19.

Math question: Determine the sum of the digits in the number 1815 and multiply it by the number of factors the number 1815 has. Subtract the result from the square of 1815. What is the final value obtained?

To obtain the final value, we first find the sum of the digits: 1 + 8 + 1 + 5 = 15. The number 1815 factors into 3, 5, 11, 33, 55, 165, and 1815 itself, giving a total of 7 factors. Multiplying the sum by the number of factors, we have 15 * 7 = 105. Finally, we subtract this from the square of 1815: 1815^2 - 105 = 3301920. Therefore, the final value obtained is 3301920.

Question: If 1815 apples are evenly distributed among 9 children, and each child receives the same number of apples, how many apples does each child receive?

To solve this problem, we divide 1815 by 9, which results in 201.66667. However, since we cannot have a fraction of an apple, we round down to the nearest whole number. Therefore, each child would receive 201 apples.

Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

1815 (number)

1815 is an odd 4-digits composite number following 1814 and preceding 1816. In scientific notation, it is written as 1.815 × 10^3. The sum of its digits is 15. It has a total of 3 prime factors and 6 positive divisors. There are 880 positive integers (up to 1815) that are relatively prime to 1815.

Interesting facts

1815 has 6 divisors, whose sum is 2128
The reverse of 1815 is 5181
Previous prime number is 11

Basic properties

Is Prime? no
Number parity odd
Number length 4
Sum of Digits 15
Digital Root 6

Name

Name	one thousand eight hundred fifteen

Notation

Scientific notation	1.815 × 10^3
Engineering notation	1.815 × 10^3

Prime Factorization of 1815

Prime Factorization 15 × 11 × 11

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	165	Product of the distinct prime numbers

The prime factorization of 1815 is 15 × 11 × 11. Since it has a total of 3 prime factors.

Most popular turbo-numbers

8, 1, 44, 65, 654, 405, 6322, 8503, 73211, 89274, 456434, 590734, 7965538, 9914648, 1257784, 53493727, 520683551, 832214146, 3137657244, 6148942240

Basic calculations (n = 1815)

Multiplication

n×y

n×2	3630
n×3	5445
n×4	7260
n×5	9075

Division

n÷y

n÷2	907.5
n÷3	605
n÷3	453.75
n÷5	363

Exponentiation

n^y

n²	3294225
n³	5979018375
n⁴	10851918350625
n⁵	19696231806384375

Nth Root

^y√n

²√n	42.602816808282
³√n	12.198100573234
⁴√n	6.5270833308823
⁵√n	4.4851329993952

Divisors of 1815

1, 11, 15, 121, 165, 1815

6 divisors

τ	Total Divisors	6	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-1814	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.16666666666667	Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G	Geometric Mean	1	Returns the nth root of the product of n divisors
H	Harmonic Mean	6	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 1815 can be divided by 6 positive divisors. The sum of these divisors (counting 1815) is 1, the average is 0.16666666666667.

Base conversion 1815

Base	System	Value
2	Binary	11100010111
3	Ternary	2111020
4	Quaternary	130113
5	Quinary	24230
6	Senary	12223
8	Octal	3427
10	Decimal	1815
12	Duodecimal	1073
16	Hexadecimal	717
20	Vigesimal	4af
36	Base36	1ef

Cryptographic Hash Functions

md5	f0bbac6fa079f1e00b2c14c1d3c6ccf0
sha1	0a3f49ae46653bab4a1192a615ac49b183764919
sha256	934aa7be7deafc0053e92ce49a029603af8bc0b3891322a10b7ab730dfaa5d63
sha512	9c386a82bed7f4ca5a48d386d60d785e9f91154df1be5c90a3785c2e78c58ad87eb648b08b7f7b352435ac45b7b81fefb11ca39f6d806081b3b7ab0d7953434e
ripemd-160	744336a001bfd8af8e4993665753c48e84373694

1815 as geometric shapes

Circle

Radius = n

Diameter	3630
Circumference	11403.981332531
Area	10349113.059272

Sphere

Radius = n

Volume	25044853603.438
Surface area	41396452.237087
Circumference	11403.981332531

Square

Length = n

Perimeter	7260
Area	3294225
Diagonal	2566.7976157072

Cube

Length = n

Surface area	19765350
Volume	5979018375
Space diagonal	3143.6722157375

Equilateral Triangle

Length = n

Perimeter	5445
Area	1426441.2678909
Altitude	1571.8361078688

Triangular Pyramid

Length = n

Surface area	1426441.2678909
Volume	704634072.96691
Height	855.59920523572