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

81121618 (number)

81121618 is an even 8-digits composite number following 81121617 and preceding 81121619. In scientific notation, it is written as 8.1121618 × 10^7. The sum of its digits is 28. It has a total of 3 prime factors and 8 positive divisors. There are 39989460 positive integers (up to 81121618) that are relatively prime to 81121618.

Interesting facts

81121618 has 8 divisors, whose sum is 123396480
The reverse of 81121618 is 81612118
Previous prime number is 71

Basic properties

Is Prime? no
Number parity even
Number length 8
Sum of Digits 28
Digital Root 1

Name

Name	eighty-one million one hundred twenty-one thousand six hundred eighteen

Notation

Scientific notation	8.1121618 × 10^7
Engineering notation	8.1121618 × 10^6

Prime Factorization of 81121618

Prime Factorization 2 × 71 × 571279

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81121618	Product of the distinct prime numbers

The prime factorization of 81121618 is 2 × 71 × 571279. Since it has a total of 3 prime factors.

Most popular turbo-numbers

2, 8, 18, 15, 680, 839, 2387, 2481, 55489, 2364, 516727, 848532, 1902470, 598146, 4730585, 90119689, 56920079, 18919001, 1406302659, 9161169254

Basic calculations (n = 81121618)

Multiplication

n×y

n×2	162243236
n×3	243364854
n×4	324486472
n×5	405608090

Division

n÷y

n÷2	40560809
n÷3	27040539.333333
n÷3	20280404.5
n÷5	16224323.6

Exponentiation

n^y

n²	6580716906937924
n³	5.3383840309076E+23
n⁴	4.3305835009259E+31
n⁵	3.5130394047921E+39

Nth Root

^y√n

²√n	9006.7540212887
³√n	432.89131034465
⁴√n	94.903919946906
⁵√n	38.179243676044

Divisors of 81121618

1, 2, 71, 142, 571279, 1142558, 40560809, 81121618

8 divisors

τ	Total Divisors	8	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-81121617	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.125	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	8	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81121618 can be divided by 8 positive divisors. The sum of these divisors (counting 81121618) is 1, the average is 0.125.

Base conversion 81121618

Base	System	Value
2	Binary	100110101011101000101010010
3	Ternary	12122122101221101
4	Quaternary	10311131011102
5	Quinary	131231342433
6	Senary	12014415014
8	Octal	465350522
10	Decimal	81121618
12	Duodecimal	2320146a
16	Hexadecimal	4d5d152
20	Vigesimal	157040i
36	Base36	1capua

Cryptographic Hash Functions

md5	168110dc3ddce241594e17fd66998c4f
sha1	88dcb5fbec28b6c548502fe28fd85c69dd9aae19
sha256	7b1734bb63723b472832adae5d3398dd942ec1b03a717fc1ac74e47aed7fc4cd
sha512	3f17a56f2d046490c5259cde24b73c21733e1b16fcfd668f4f294d04ce5e6ad4dc6ab2790ded3f92566638330c42a5f5bd9fe15812bef19b3608211ed2c2284c
ripemd-160	7b565aeddfab9745fa271b512a416661e6f30219

81121618 as geometric shapes

Circle

Radius = n

Diameter	162243236
Circumference	509702158.31224
Area	2.067393189019E+16

Sphere

Radius = n

Volume	2.2361370738054E+24
Surface area	8.2695727560761E+16
Circumference	509702158.31224

Square

Length = n

Perimeter	324486472
Area	6580716906937924
Diagonal	114723292.37725

Cube

Length = n

Surface area	39484301441627544
Volume	5.3383840309076E+23
Space diagonal	140506763.96819

Equilateral Triangle

Length = n

Perimeter	243364854
Area	2.849534008261E+15
Altitude	70253381.984097

Triangular Pyramid

Length = n

Surface area	2.849534008261E+15
Volume	6.2913459147212E+22
Height	38241097.459083