81687130 (number)

81687130 is an even 8-digits composite number following 81687129 and preceding 81687131. In scientific notation, it is written as 8.1687130 × 10^7. The sum of its digits is 34. It has a total of 4 prime factors and 16 positive divisors. There are 27876096 positive integers (up to 81687130) that are relatively prime to 81687130.

Interesting facts

Basic properties

Name

Name eighty-one million six hundred eighty-seven thousand one hundred thirty

Notation

Scientific notation 8.1687130 × 10^7
Engineering notation 8.1687130 × 10^6

Prime Factorization of 81687130

Prime Factorization 2 × 35 × 223 × 5233

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81687130
Product of the distinct prime numbers

The prime factorization of 81687130 is 2 × 35 × 223 × 5233. Since it has a total of 4 prime factors.

Most popular turbo-numbers

10, 10, 9, 38, 503, 291, 2042, 3180, 91186, 24660, 678482, 717130, 7513146, 1191341, 41177875, 74797186, 586612726, 52906206, 2128077853, 1991038998

Basic calculations (n = 81687130)

Multiplication

n×y
n×2 163374260
n×3 245061390
n×4 326748520
n×5 408435650

Division

n÷y
n÷2 40843565
n÷3 27229043.333333
n÷3 20421782.5
n÷5 16337426

Exponentiation

ny
n2 6672787207636900
n3 5.4508083609257E+23
n4 4.4526089118403E+31
n5 3.6372084302065E+39

Nth Root

y√n
2√n 9038.0932723667
3√n 433.89490047107
4√n 95.068886983948
5√n 38.23232660592

Divisors of 81687130

1, 2, 35, 70, 223, 446, 5233, 7805, 10466, 15610, 183155, 366310, 1166959, 2333918, 40843565, 81687130

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81687129
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
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 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81687130 can be divided by 16 positive divisors. The sum of these divisors (counting 81687130) is 1, the average is 0.0625.

Base conversion 81687130

Base System Value
2 Binary 100110111100111001001011010
3 Ternary 12200201010200021
4 Quaternary 10313213021122
5 Quinary 131402442010
6 Senary 12034501054
8 Octal 467471132
10 Decimal 81687130
12 Duodecimal 2343478a
16 Hexadecimal 4de725a
20 Vigesimal 15aahga
36 Base36 1cmu6y

Cryptographic Hash Functions

md5 b93fcc2c016e3dcb8e97acd1e64fb9b0
sha1 a867f494914416839ddd552aa659d3a04af904c4
sha256 00dfc05ff5a77bc3104e19a44ec40c3a8cec1159bad391b8ecfbd95f3a32e910
sha512 60f8500d9fc81f8db835c183fa923fac71f0494858d4a20e1c195b970e316b57dd46d6699de29bafd627fb18243f45183ac0c7df7626a641474c25d4a476f089
ripemd-160 f0467c5b8ee97cf857cddb44cb7dacd51870676d

81687130 as geometric shapes

Circle

Radius = n
Diameter 163374260
Circumference 513255375.00167
Area 2.096317927048E+16

Sphere

Radius = n
Volume 2.2832292670413E+24
Surface area 8.385271708192E+16
Circumference 513255375.00167

Square

Length = n
Perimeter 326748520
Area 6672787207636900
Diagonal 115523047.11733

Cube

Length = n
Surface area 40036723245821400
Volume 5.4508083609257E+23
Space diagonal 141486259.48448

Equilateral Triangle

Length = n
Perimeter 245061390
Area 2.8894016179307E+15
Altitude 70743129.742242

Triangular Pyramid

Length = n
Surface area 2.8894016179307E+15
Volume 6.4238392582649E+22
Height 38507682.372445