81521520 (number)

81521520 is an even 8-digits composite number following 81521519 and preceding 81521521. In scientific notation, it is written as 8.1521520 × 10^7. The sum of its digits is 24. It has a total of 6 prime factors and 20 positive divisors. There are 21739008 positive integers (up to 81521520) that are relatively prime to 81521520.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1521520 × 10^7
Engineering notation 8.1521520 × 10^6

Prime Factorization of 81521520

Prime Factorization 2 × 2 × 2 × 2 × 15 × 339673

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 6
Total number of prime factors
rad Radical 10190190
Product of the distinct prime numbers

The prime factorization of 81521520 is 2 × 2 × 2 × 2 × 15 × 339673. Since it has a total of 6 prime factors.

Most popular turbo-numbers

2, 4, 59, 71, 627, 743, 9094, 6521, 56308, 43382, 596556, 449172, 60417, 589055, 85396577, 70398050, 284537377, 178272750, 1204140826, 3937048681

Basic calculations (n = 81521520)

Multiplication

n×y
n×2 163043040
n×3 244564560
n×4 326086080
n×5 407607600

Division

n÷y
n÷2 40760760
n÷3 27173840
n÷3 20380380
n÷5 16304304

Exponentiation

ny
n2 6645758223110400
n3 5.4177231190046E+23
n4 4.416610236004E+31
n5 3.600487796866E+39

Nth Root

y√n
2√n 9028.9268465305
3√n 433.60148032156
4√n 95.020665365648
5√n 38.216811808163

Divisors of 81521520

1, 2, 4, 8, 15, 16, 30, 60, 120, 240, 339673, 679346, 1358692, 2717384, 5095095, 5434768, 10190190, 20380380, 40760760, 81521520

20 divisors

τ Total Divisors 20
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81521519
Sum of the proper positive divisors of n
A Arithmetic Mean 0.05
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 20
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81521520 can be divided by 20 positive divisors. The sum of these divisors (counting 81521520) is 1, the average is 0.05.

Base conversion 81521520

Base System Value
2 Binary 100110110111110101101110000
3 Ternary 12200101201111120
4 Quaternary 10312332231300
5 Quinary 131332142040
6 Senary 12031142240
8 Octal 466765560
10 Decimal 81521520
12 Duodecimal 23374980
16 Hexadecimal 4dbeb70
20 Vigesimal 159a3g0
36 Base36 1cjaeo

Cryptographic Hash Functions

md5 414ce5b44e53e858431c3388fbde915d
sha1 90fc5b1f0bfca3c7bf657e5834254a210be2243a
sha256 a16bd461085b6a2affd3f684a353a3bb584b0fecf6cf5f2c13968ea137f4694b
sha512 b8302942271aaba6bbc3c5c4c83106a2329772ded604f776aa5430f3ebf0ba83e03ed4be16f0acaf7789102a1ac2a4c339b5b36a6a139249f7a63f55e30afcc3
ripemd-160 4df6177e234994fc58e8438d3a521b1a7e2ec581

81521520 as geometric shapes

Circle

Radius = n
Diameter 163043040
Circumference 512214816.68295
Area 2.0878265211258E+16

Sphere

Radius = n
Volume 2.2693705533131E+24
Surface area 8.351306084503E+16
Circumference 512214816.68295

Square

Length = n
Perimeter 326086080
Area 6645758223110400
Diagonal 115288839.20927

Cube

Length = n
Surface area 39874549338662400
Volume 5.4177231190046E+23
Space diagonal 141199414.55024

Equilateral Triangle

Length = n
Perimeter 244564560
Area 2.8776977243115E+15
Altitude 70599707.275121

Triangular Pyramid

Length = n
Surface area 2.8776977243115E+15
Volume 6.3848479267321E+22
Height 38429613.069757