81251768 (number)

81251768 is an even 8-digits composite number following 81251767 and preceding 81251769. In scientific notation, it is written as 8.1251768 × 10^7. The sum of its digits is 38. It has a total of 6 prime factors and 32 positive divisors. There are 36626688 positive integers (up to 81251768) that are relatively prime to 81251768.

Interesting facts

Basic properties

Name

Name eighty-one million two hundred fifty-one thousand seven hundred sixty-eight

Notation

Scientific notation 8.1251768 × 10^7
Engineering notation 8.1251768 × 10^6

Prime Factorization of 81251768

Prime Factorization 2 × 2 × 2 × 13 × 43 × 18169

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 6
Total number of prime factors
rad Radical 20312942
Product of the distinct prime numbers

The prime factorization of 81251768 is 2 × 2 × 2 × 13 × 43 × 18169. Since it has a total of 6 prime factors.

Most popular turbo-numbers

5, 7, 77, 58, 530, 82, 5368, 4335, 88661, 38750, 86317, 438664, 347128, 1866658, 10515913, 56251660, 390250096, 193452116, 9117768844, 5477086463

Basic calculations (n = 81251768)

Multiplication

n×y
n×2 162503536
n×3 243755304
n×4 325007072
n×5 406258840

Division

n÷y
n÷2 40625884
n÷3 27083922.666667
n÷3 20312942
n÷5 16250353.6

Exponentiation

ny
n2 6601849803125824
n3 5.3641196857443E+23
n4 4.3584420823032E+31
n5 3.5413112491274E+39

Nth Root

y√n
2√n 9013.9762591212
3√n 433.12269420815
4√n 94.941962583049
5√n 38.191486633881

Divisors of 81251768

1, 2, 4, 8, 13, 26, 43, 52, 86, 104, 172, 344, 559, 1118, 2236, 4472, 18169, 36338, 72676, 145352, 236197, 472394, 781267, 944788, 1562534, 1889576, 3125068, 6250136, 10156471, 20312942, 40625884, 81251768

32 divisors

τ Total Divisors 32
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81251767
Sum of the proper positive divisors of n
A Arithmetic Mean 0.03125
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 32
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81251768 can be divided by 32 positive divisors. The sum of these divisors (counting 81251768) is 1, the average is 0.03125.

Base conversion 81251768

Base System Value
2 Binary 100110101111100110110111000
3 Ternary 12122220000110202
4 Quaternary 10311330312320
5 Quinary 131300024033
6 Senary 12021301332
8 Octal 465746670
10 Decimal 81251768
12 Duodecimal 23264848
16 Hexadecimal 4d7cdb8
20 Vigesimal 157g988
36 Base36 1cdi9k

Cryptographic Hash Functions

md5 6e9f336132123408861c102961f29ba4
sha1 22430a6c71e6c397ce319fc73f5ef10b5ac77b6e
sha256 e5baa4dd301366313cc696b82fa563d7d1fed97bbae5e791e34c7db2715a8a24
sha512 3c40fb3a33ad73ee665b1008f7428707aeee1167e0017fa910c7574c7973fbe8be74444bd01bda639e88551166ae3e44a2a8e33b420a2d59f47794d77c82a793
ripemd-160 93f2cdf96d960b67ce91663f1ac4903760e1572e

81251768 as geometric shapes

Circle

Radius = n
Diameter 162503536
Circumference 510519914.87996
Area 2.0740322841603E+16

Sphere

Radius = n
Volume 2.2469171996947E+24
Surface area 8.2961291366413E+16
Circumference 510519914.87996

Square

Length = n
Perimeter 325007072
Area 6601849803125824
Diagonal 114907352.27239

Cube

Length = n
Surface area 39611098818754944
Volume 5.3641196857443E+23
Space diagonal 140732190.3808

Equilateral Triangle

Length = n
Perimeter 243755304
Area 2.8586848207381E+15
Altitude 70366095.1904

Triangular Pyramid

Length = n
Surface area 2.8586848207381E+15
Volume 6.32167567481E+22
Height 38302450.757464