81556987 (number)

81556987 is an odd 8-digits composite number following 81556986 and preceding 81556988. In scientific notation, it is written as 8.1556987 × 10^7. The sum of its digits is 49. It has a total of 4 prime factors and 16 positive divisors. There are 75442752 positive integers (up to 81556987) that are relatively prime to 81556987.

Interesting facts

Basic properties

Name

Name eighty-one million five hundred fifty-six thousand nine hundred eighty-seven

Notation

Scientific notation 8.1556987 × 10^7
Engineering notation 8.1556987 × 10^6

Prime Factorization of 81556987

Prime Factorization 127 × 19 × 73 × 463

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81556987
Product of the distinct prime numbers

The prime factorization of 81556987 is 127 × 19 × 73 × 463. Since it has a total of 4 prime factors.

Most popular turbo-numbers

9, 5, 2, 67, 717, 687, 416, 9095, 95075, 48707, 731488, 957732, 2720882, 1240454, 83001943, 13104746, 866558987, 566129590, 3465515607, 8254264820

Basic calculations (n = 81556987)

Multiplication

n×y
n×2 163113974
n×3 244670961
n×4 326227948
n×5 407784935

Division

n÷y
n÷2 40778493.5
n÷3 27185662.333333
n÷3 20389246.75
n÷5 16311397.4

Exponentiation

ny
n2 6651542128518169
n3 5.4247973490551E+23
n4 4.4243012687452E+31
n5 3.6083268105914E+39

Nth Root

y√n
2√n 9030.8907091161
3√n 433.66435253015
4√n 95.030998674728
5√n 38.220136574056

Divisors of 81556987

1, 19, 73, 127, 463, 1387, 2413, 8797, 9271, 33799, 58801, 176149, 642181, 1117219, 4292473, 81556987

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 -81556986
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 81556987 can be divided by 16 positive divisors. The sum of these divisors (counting 81556987) is 1, the average is 0.0625.

Base conversion 81556987

Base System Value
2 Binary 100110111000111010111111011
3 Ternary 12200110112011011
4 Quaternary 10313013113323
5 Quinary 131334310422
6 Senary 12032014351
8 Octal 467072773
10 Decimal 81556987
12 Duodecimal 233913b7
16 Hexadecimal 4dc75fb
20 Vigesimal 159ec97
36 Base36 1ck1rv

Cryptographic Hash Functions

md5 570e6f03731b857b16b46fe2592560cb
sha1 572827e77b5ba48b9494fc0bf057bfef80a6d7cb
sha256 856ac2377c8f4d89de43c9a9ca6b17b10d2be52a269d5a7b1bbca800de52916b
sha512 13dc72a3f5223ee470573081477e54839f35ab3ee0eedebd542c93949ee2de947f7692ba1743b8d3b1467af922fd89a59accff00b37384785e293faacf9a145d
ripemd-160 96dd705043d4226e93dd32067a32bd7ab963b38d

81556987 as geometric shapes

Circle

Radius = n
Diameter 163113974
Circumference 512437662.41624
Area 2.0896435885996E+16

Sphere

Radius = n
Volume 2.2723337998673E+24
Surface area 8.3585743543983E+16
Circumference 512437662.41624

Square

Length = n
Perimeter 326227948
Area 6651542128518169
Diagonal 115338997.12169

Cube

Length = n
Surface area 39909252771109014
Volume 5.4247973490551E+23
Space diagonal 141260845.19623

Equilateral Triangle

Length = n
Perimeter 244670961
Area 2.8802022288196E+15
Altitude 70630422.598117

Triangular Pyramid

Length = n
Surface area 2.8802022288196E+15
Volume 6.3931849867994E+22
Height 38446332.373895