Math question: What is the sum of all odd numbers less than or equal to 71?

In order to find the sum of all odd numbers less than or equal to 71, we first need to determine the total number of odd integers that are less than or equal to 71. This can be calculated by subtracting the largest even number smaller than 71 (which is 70) from 71, and then dividing it by 2, which gives us (71 - 70) / 2 = 1. Now, to find the sum of all odd numbers up to 71, we can use the formula for the sum of an arithmetic series: Sn = (n/2)(a + l), where Sn represents the sum of the series, n is the number of terms, a is the first term, and l is the last term. Since we have only one term (n = 1) and 71 is the only odd number, the sum of the odd numbers up to 71 is (1/2)(71 + 71) = 71. Therefore, the sum of all odd numbers less than or equal to 71 is 71.

Math question: If a number is increased by 45 and then divided by 3, the result is 38. What is the number?

Let's assume the number is x. According to the question, the equation can be written as (x + 45) / 3 = 38. Solving this equation, we'll first multiply both sides by 3 to remove the fraction, giving us x + 45 = 3 * 38 = 114. Next, we subtract 45 from both sides, obtaining x = 114 - 45 = 69. Hence, the number is 69.

Math question: What is the sum of 71 and its double?

To find the sum, double the number 71. Multiplying 71 by 2 gives us 142. Now, add 71 and 142 together. We have 71 + 142 = 213. Therefore, the sum of 71 and its double is 213.

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

71 (number)

71 is an odd 2-digits prime number following 70 and preceding 72. In scientific notation, it is written as 7.1 × 10^1. The sum of its digits is 8. It has a total of 1 prime factors and 2 positive divisors. There are 70 positive integers (up to 71) that are relatively prime to 71.

Interesting facts

71 has 2 divisors, whose sum is 72
The reverse of 71 is 17
Previous prime number is 1

Basic properties

Is Prime? yes
Number parity odd
Number length 2
Sum of Digits 8
Digital Root 8

Name

Name	seventy-one

Notation

Scientific notation	7.1 × 10^1
Engineering notation	7.1 × 10^0

Prime Factorization of 71

Prime Factorization 71

Composite number

ω	Distinct Factors	1	Total number of distinct prime factors
Ω	Total Factors	1	Total number of prime factors
rad	Radical	71	Product of the distinct prime numbers

The prime factorization of 71 is 71. Since it has a total of 1 prime factors.

Most popular turbo-numbers

3, 3, 82, 7, 285, 839, 714, 6764, 41424, 57303, 714141, 439890, 4421859, 5043681, 5090027, 93970307, 56547223, 396804680, 376442482, 2770765758

Basic calculations (n = 71)

Multiplication

n×y

n×2	142
n×3	213
n×4	284
n×5	355

Division

n÷y

n÷2	35.5
n÷3	23.666666666667
n÷3	17.75
n÷5	14.2

Exponentiation

n^y

n²	5041
n³	357911
n⁴	25411681
n⁵	1804229351

Nth Root

^y√n

²√n	8.4261497731764
³√n	4.1408177494229
⁴√n	2.9027831081871
⁵√n	2.345587668505

Divisors of 71

1, 71

2 divisors

τ	Total Divisors	2	Total number of the positive divisors of n
σ	Sum of Divisors	72	Sum of all the positive divisors of n
s	Aliquot Sum	1	Sum of the proper positive divisors of n
A	Arithmetic Mean	36	Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G	Geometric Mean	8.4852813742386	Returns the nth root of the product of n divisors
H	Harmonic Mean	1.9722222222222	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 71 can be divided by 2 positive divisors. The sum of these divisors (counting 71) is 72, the average is 36.

Base conversion 71

Base	System	Value
2	Binary	1000111
3	Ternary	2122
4	Quaternary	1013
5	Quinary	241
6	Senary	155
8	Octal	107
10	Decimal	71
12	Duodecimal	5b
16	Hexadecimal	47
20	Vigesimal	3b
36	Base36	1z

Cryptographic Hash Functions

md5	e2c420d928d4bf8ce0ff2ec19b371514
sha1	d02560dd9d7db4467627745bd6701e809ffca6e3
sha256	7f2253d7e228b22a08bda1f09c516f6fead81df6536eb02fa991a34bb38d9be8
sha512	a8abec0b2fac3f9c8d08c0b2b06e75e591b67a5cba47cc0f0c66468f1db6b5ddb75461b57ea1e17f1eb90b62e6ca9e1cd2491e43829709288e1f1f592bcae1a1
ripemd-160	6224bb0f754b3449957040f3f3126b503db38642

71 as geometric shapes

Circle

Radius = n

Diameter	142
Circumference	446.10615680975
Area	15836.768566746

Sphere

Radius = n

Volume	1499214.0909853
Surface area	63347.074266985
Circumference	446.10615680975

Square

Length = n

Perimeter	284
Area	5041
Diagonal	100.40916292849

Cube

Length = n

Surface area	30246
Volume	357911
Space diagonal	122.97560733739

Equilateral Triangle

Length = n

Perimeter	213
Area	2182.8170302387
Altitude	61.487803668695

Triangular Pyramid

Length = n

Surface area	2182.8170302387
Volume	42180.21586021
Height	33.469720976163