81311208 (number)

81311208 is an even 8-digits composite number following 81311207 and preceding 81311209. In scientific notation, it is written as 8.1311208 × 10^7. The sum of its digits is 24. It has a total of 7 prime factors and 64 positive divisors. There are 24550080 positive integers (up to 81311208) that are relatively prime to 81311208.

Interesting facts

Basic properties

Name

Name eighty-one million three hundred eleven thousand two hundred eight

Notation

Scientific notation 8.1311208 × 10^7
Engineering notation 8.1311208 × 10^6

Prime Factorization of 81311208

Prime Factorization 2 × 2 × 2 × 3 × 11 × 643 × 479

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 7
Total number of prime factors
rad Radical 20327802
Product of the distinct prime numbers

The prime factorization of 81311208 is 2 × 2 × 2 × 3 × 11 × 643 × 479. Since it has a total of 7 prime factors.

Most popular turbo-numbers

10, 8, 31, 95, 944, 324, 3441, 6193, 42326, 11594, 339976, 443232, 4592067, 1819552, 88002862, 97563573, 451526052, 172688463, 8066955655, 1627232510

Basic calculations (n = 81311208)

Multiplication

n×y
n×2 162622416
n×3 243933624
n×4 325244832
n×5 406556040

Division

n÷y
n÷2 40655604
n÷3 27103736
n÷3 20327802
n÷5 16262241.6

Exponentiation

ny
n2 6611512546419264
n3 5.3759007185651E+23
n4 4.3712098151459E+31
n5 3.5542835049097E+39

Nth Root

y√n
2√n 9017.2727584342
3√n 433.22828591086
4√n 94.959321598431
5√n 38.197072821191

Divisors of 81311208

1, 2, 3, 4, 6, 8, 11, 12, 22, 24, 33, 44, 66, 88, 132, 264, 479, 643, 958, 1286, 1437, 1916, 1929, 2572, 2874, 3832, 3858, 5144, 5269, 5748, 7073, 7716, 10538, 11496, 14146, 15432, 15807, 21076, 21219, 28292, 31614, 42152, 42438, 56584, 63228, 84876, 126456, 169752, 307997, 615994, 923991, 1231988, 1847982, 2463976, 3387967, 3695964, 6775934, 7391928, 10163901, 13551868, 20327802, 27103736, 40655604, 81311208

64 divisors

τ Total Divisors 64
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81311207
Sum of the proper positive divisors of n
A Arithmetic Mean 0.015625
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 64
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81311208 can be divided by 64 positive divisors. The sum of these divisors (counting 81311208) is 1, the average is 0.015625.

Base conversion 81311208

Base System Value
2 Binary 100110110001011010111101000
3 Ternary 12200000001000020
4 Quaternary 10312023113220
5 Quinary 131303424313
6 Senary 12022440440
8 Octal 466132750
10 Decimal 81311208
12 Duodecimal 23293120
16 Hexadecimal 4d8b5e8
20 Vigesimal 1583i08
36 Base36 1ces4o

Cryptographic Hash Functions

md5 3962c7eff8e741a3b1b59f36c97fb4dc
sha1 d1c5e6d35d54387706aa8695561ae5123d7d4703
sha256 b1697082f3f054c7ba747379f358519557fb17cfe625ee8e8be03006f25debf9
sha512 e605b765cf243df944fc1afd2ad21f67cf634a119c7493b62e84d59ce15a40a5e98a16a72d319d68eddd7a9fdbd9112ebe7cfc0be02c2e3c32a06e5023e28cee
ripemd-160 c9cc08117dc2c136d0c4f487a204c03b4e0612e2

81311208 as geometric shapes

Circle

Radius = n
Diameter 162622416
Circumference 510893387.41462
Area 2.0770679244948E+16

Sphere

Radius = n
Volume 2.2518520271829E+24
Surface area 8.308271697979E+16
Circumference 510893387.41462

Square

Length = n
Perimeter 325244832
Area 6611512546419264
Diagonal 114991413.12654

Cube

Length = n
Surface area 39669075278515584
Volume 5.3759007185651E+23
Space diagonal 140835143.4808

Equilateral Triangle

Length = n
Perimeter 243933624
Area 2.8628689113193E+15
Altitude 70417571.7404

Triangular Pyramid

Length = n
Surface area 2.8628689113193E+15
Volume 6.3355597551383E+22
Height 38330471.04218