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

81293721 (number)

81293721 is an odd 8-digits composite number following 81293720 and preceding 81293722. In scientific notation, it is written as 8.1293721 × 10^7. The sum of its digits is 33. It has a total of 2 prime factors and 4 positive divisors. There are 54195812 positive integers (up to 81293721) that are relatively prime to 81293721.

Interesting facts

81293721 has 4 divisors, whose sum is 108391632
The reverse of 81293721 is 12739218
Previous prime number is 3

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 33
Digital Root 6

Name

Name	eighty-one million two hundred ninety-three thousand seven hundred twenty-one

Notation

Scientific notation	8.1293721 × 10^7
Engineering notation	8.1293721 × 10^6

Prime Factorization of 81293721

Prime Factorization 3 × 27097907

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	81293721	Product of the distinct prime numbers

The prime factorization of 81293721 is 3 × 27097907. Since it has a total of 2 prime factors.

Most popular turbo-numbers

5, 6, 16, 40, 820, 562, 6359, 1296, 73214, 30242, 225435, 266851, 5332818, 7198612, 31606404, 66990840, 433241712, 80235705, 4154790757, 5571936786

Basic calculations (n = 81293721)

Multiplication

n×y

n×2	162587442
n×3	243881163
n×4	325174884
n×5	406468605

Division

n÷y

n÷2	40646860.5
n÷3	27097907
n÷3	20323430.25
n÷5	16258744.2

Exponentiation

n^y

n²	6608669074025841
n³	5.3724329988519E+23
n⁴	4.3674506929986E+31
n⁵	3.5504631811788E+39

Nth Root

^y√n

²√n	9016.3030672222
³√n	433.19722661665
⁴√n	94.954215636917
⁵√n	38.195429727461

Divisors of 81293721

1, 3, 27097907, 81293721

4 divisors

τ	Total Divisors	4	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-81293720	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.25	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	4	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81293721 can be divided by 4 positive divisors. The sum of these divisors (counting 81293721) is 1, the average is 0.25.

Base conversion 81293721

Base	System	Value
2	Binary	100110110000111000110011001
3	Ternary	12122222011000120
4	Quaternary	10312013012121
5	Quinary	131302344341
6	Senary	12022223453
8	Octal	466070631
10	Decimal	81293721
12	Duodecimal	23284b89
16	Hexadecimal	4d87199
20	Vigesimal	1581e61
36	Base36	1ceemx

Cryptographic Hash Functions

md5	6f4c99394bc51cba14a402a77a16b95a
sha1	ba5f59c11f31eb2d07464fc2602a21122bf24960
sha256	bea06153bf5828cf07516cd30f74075fe84ca8a89462e8a9fccfdeb5ca9817ba
sha512	812d295502fad987616fa205f707bef7b186ab32d41c14281c9d753669a0bfe7ca9aa6fee1be90a8cf3e238280e7b040561aab022cb8ab0628c6fbf78883d0be
ripemd-160	975b6e5c61308bd9546ff7b9a8c83925d8ce1852

81293721 as geometric shapes

Circle

Radius = n

Diameter	162587442
Circumference	510783513.35316
Area	2.0761746212966E+16

Sphere

Radius = n

Volume	2.2503994721462E+24
Surface area	8.3046984851863E+16
Circumference	510783513.35316

Square

Length = n

Perimeter	325174884
Area	6608669074025841
Diagonal	114966682.77397

Cube

Length = n

Surface area	39652014444155046
Volume	5.3724329988519E+23
Space diagonal	140804855.10833

Equilateral Triangle

Length = n

Perimeter	243881163
Area	2.8616376516555E+15
Altitude	70402427.554164

Triangular Pyramid

Length = n

Surface area	2.8616376516555E+15
Volume	6.3314730082642E+22
Height	38322227.591325