81521808 (number)

81521808 is an even 8-digits composite number following 81521807 and preceding 81521809. In scientific notation, it is written as 8.1521808 × 10^7. The sum of its digits is 33. It has a total of 8 prime factors and 80 positive divisors. There are 26248320 positive integers (up to 81521808) that are relatively prime to 81521808.

Interesting facts

Basic properties

Name

Name eighty-one million five hundred twenty-one thousand eight hundred eight

Notation

Scientific notation 8.1521808 × 10^7
Engineering notation 8.1521808 × 10^6

Prime Factorization of 81521808

Prime Factorization 2 × 2 × 2 × 2 × 3 × 311 × 43 × 127

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 8
Total number of prime factors
rad Radical 10190226
Product of the distinct prime numbers

The prime factorization of 81521808 is 2 × 2 × 2 × 2 × 3 × 311 × 43 × 127. Since it has a total of 8 prime factors.

Most popular turbo-numbers

2, 5, 76, 22, 63, 235, 1433, 615, 65779, 69949, 250621, 192045, 6884942, 491313, 57237213, 55074910, 379910707, 401223196, 2604218955, 8053494137

Basic calculations (n = 81521808)

Multiplication

n×y
n×2 163043616
n×3 244565424
n×4 326087232
n×5 407609040

Division

n÷y
n÷2 40760904
n÷3 27173936
n÷3 20380452
n÷5 16304361.6

Exponentiation

ny
n2 6645805179588864
n3 5.4177805385585E+23
n4 4.416672648505E+31
n5 3.6005513965028E+39

Nth Root

y√n
2√n 9028.9427952557
3√n 433.60199093143
4√n 95.020749288015
5√n 38.216838810668

Divisors of 81521808

1, 2, 3, 4, 6, 8, 12, 16, 24, 43, 48, 86, 127, 129, 172, 254, 258, 311, 344, 381, 508, 516, 622, 688, 762, 933, 1016, 1032, 1244, 1524, 1866, 2032, 2064, 2488, 3048, 3732, 4976, 5461, 6096, 7464, 10922, 13373, 14928, 16383, 21844, 26746, 32766, 39497, 40119, 43688, 53492, 65532, 78994, 80238, 87376, 106984, 118491, 131064, 157988, 160476, 213968, 236982, 262128, 315976, 320952, 473964, 631952, 641904, 947928, 1698371, 1895856, 3396742, 5095113, 6793484, 10190226, 13586968, 20380452, 27173936, 40760904, 81521808

80 divisors

τ Total Divisors 80
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81521807
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0125
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 80
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81521808 can be divided by 80 positive divisors. The sum of these divisors (counting 81521808) is 1, the average is 0.0125.

Base conversion 81521808

Base System Value
2 Binary 100110110111110110010010000
3 Ternary 12200101201220020
4 Quaternary 10312332302100
5 Quinary 131332144213
6 Senary 12031143440
8 Octal 466766220
10 Decimal 81521808
12 Duodecimal 23374b80
16 Hexadecimal 4dbec90
20 Vigesimal 159a4a8
36 Base36 1cjamo

Cryptographic Hash Functions

md5 3ba25799f303daa8ba119f2293b924bf
sha1 2f1f5fc928577a4429a8818cdee55964def88321
sha256 a37d8129472e3f719b4c11a2f01a646dcfbccdfe73ee46f0b21fa68b2324f192
sha512 433d17912d3f3e4cdee5a06da2b21039bacb577af78164014dff85fa0117e6b73207619d546b1246fe041adb9546991a63beb2ccde2ca7cb189dc88da546c640
ripemd-160 daf8a68ce8da4b1d208eadc05443525a27eec61f

81521808 as geometric shapes

Circle

Radius = n
Diameter 163043616
Circumference 512216626.24032
Area 2.0878412729385E+16

Sphere

Radius = n
Volume 2.2693946051596E+24
Surface area 8.3513650917541E+16
Circumference 512216626.24032

Square

Length = n
Perimeter 326087232
Area 6645805179588864
Diagonal 115289246.50278

Cube

Length = n
Surface area 39874831077533184
Volume 5.4177805385585E+23
Space diagonal 141199913.38087

Equilateral Triangle

Length = n
Perimeter 244565424
Area 2.8777180570631E+15
Altitude 70599956.690437

Triangular Pyramid

Length = n
Surface area 2.8777180570631E+15
Volume 6.3849155963254E+22
Height 38429748.834258