81556988 (number)

81556988 is an even 8-digits composite number following 81556987 and preceding 81556989. In scientific notation, it is written as 8.1556988 × 10^7. The sum of its digits is 50. It has a total of 5 prime factors and 18 positive divisors. There are 39004504 positive integers (up to 81556988) that are relatively prime to 81556988.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1556988 × 10^7
Engineering notation 8.1556988 × 10^6

Prime Factorization of 81556988

Prime Factorization 2 × 2 × 23 × 23 × 38543

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 1772978
Product of the distinct prime numbers

The prime factorization of 81556988 is 2 × 2 × 23 × 23 × 38543. Since it has a total of 5 prime factors.

Most popular turbo-numbers

6, 8, 9, 39, 522, 603, 2155, 2447, 14709, 71379, 38738, 2450, 6894112, 8970105, 31110986, 636135, 863846919, 919476957, 8891895734, 697598599

Basic calculations (n = 81556988)

Multiplication

n×y
n×2 163113976
n×3 244670964
n×4 326227952
n×5 407784940

Division

n÷y
n÷2 40778494
n÷3 27185662.666667
n÷3 20389247
n÷5 16311397.6

Exponentiation

ny
n2 6651542291632144
n3 5.4247975486014E+23
n4 4.4243014857371E+31
n5 3.6083270318064E+39

Nth Root

y√n
2√n 9030.8907644817
3√n 433.66435430258
4√n 95.03099896603
5√n 38.220136667782

Divisors of 81556988

1, 2, 4, 23, 46, 92, 529, 1058, 2116, 38543, 77086, 154172, 886489, 1772978, 3545956, 20389247, 40778494, 81556988

18 divisors

τ Total Divisors 18
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81556987
Sum of the proper positive divisors of n
A Arithmetic Mean 0.055555555555556
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 18
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81556988 can be divided by 18 positive divisors. The sum of these divisors (counting 81556988) is 1, the average is 0.055555555555556.

Base conversion 81556988

Base System Value
2 Binary 100110111000111010111111100
3 Ternary 12200110112011012
4 Quaternary 10313013113330
5 Quinary 131334310423
6 Senary 12032014352
8 Octal 467072774
10 Decimal 81556988
12 Duodecimal 233913b8
16 Hexadecimal 4dc75fc
20 Vigesimal 159ec98
36 Base36 1ck1rw

Cryptographic Hash Functions

md5 c055b4911c9384feaf7fe5853f7ffe11
sha1 a2dc524faf7eae17506ff10e449b7d5814cd61dd
sha256 0e33de2f9d4511898dde7c4eeb7b9da1852f0dc55872ee1779fe9fadec1488ff
sha512 cdd66e9cea410d3a1e84f9ee32882bef069427ef516c1fe467384ba00732f0d0200c8848e90a69371237bf0188b63a2a46bbce074e9395643cd3b911724195d5
ripemd-160 60243fdea0920e5f35da589a94589e91ab3672ea

81556988 as geometric shapes

Circle

Radius = n
Diameter 163113976
Circumference 512437668.69942
Area 2.0896436398433E+16

Sphere

Radius = n
Volume 2.2723338834531E+24
Surface area 8.3585745593733E+16
Circumference 512437668.69942

Square

Length = n
Perimeter 326227952
Area 6651542291632144
Diagonal 115338998.5359

Cube

Length = n
Surface area 39909253749792864
Volume 5.4247975486014E+23
Space diagonal 141260846.92829

Equilateral Triangle

Length = n
Perimeter 244670964
Area 2.88020229945E+15
Altitude 70630423.464143

Triangular Pyramid

Length = n
Surface area 2.88020229945E+15
Volume 6.393185221967E+22
Height 38446332.8453