81721330 (number)

81721330 is an even 8-digits composite number following 81721329 and preceding 81721331. In scientific notation, it is written as 8.1721330 × 10^7. The sum of its digits is 25. It has a total of 4 prime factors and 16 positive divisors. There are 32631040 positive integers (up to 81721330) that are relatively prime to 81721330.

Interesting facts

Basic properties

Name

Name eighty-one million seven hundred twenty-one thousand three hundred thirty

Notation

Scientific notation 8.1721330 × 10^7
Engineering notation 8.1721330 × 10^6

Prime Factorization of 81721330

Prime Factorization 2 × 5 × 593 × 13781

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81721330
Product of the distinct prime numbers

The prime factorization of 81721330 is 2 × 5 × 593 × 13781. Since it has a total of 4 prime factors.

Most popular turbo-numbers

4, 4, 44, 64, 927, 469, 8540, 1973, 89807, 25521, 633392, 644949, 8015256, 9904933, 2048879, 93427168, 945788745, 709353982, 3413184591, 5094458111

Basic calculations (n = 81721330)

Multiplication

n×y
n×2 163442660
n×3 245163990
n×4 326885320
n×5 408606650

Division

n÷y
n÷2 40860665
n÷3 27240443.333333
n÷3 20430332.5
n÷5 16344266

Exponentiation

ny
n2 6678375776968900
n3 5.4576575073368E+23
n4 4.4600703018405E+31
n5 3.6448287695991E+39

Nth Root

y√n
2√n 9039.9850663593
3√n 433.95544503569
4√n 95.078836059132
5√n 38.235527420179

Divisors of 81721330

1, 2, 5, 10, 593, 1186, 2965, 5930, 13781, 27562, 68905, 137810, 8172133, 16344266, 40860665, 81721330

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 -81721329
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 81721330 can be divided by 16 positive divisors. The sum of these divisors (counting 81721330) is 1, the average is 0.0625.

Base conversion 81721330

Base System Value
2 Binary 100110111101111011111110010
3 Ternary 12200202212120221
4 Quaternary 10313233133302
5 Quinary 131410040310
6 Senary 12035323254
8 Octal 467573762
10 Decimal 81721330
12 Duodecimal 2345052a
16 Hexadecimal 4def7f2
20 Vigesimal 15af36a
36 Base36 1cnkky

Cryptographic Hash Functions

md5 d6bd2827dca6a3daab877bc17122ad93
sha1 dc9dff574a4ef107599ecede86c523191e62d07f
sha256 2351242e8c66d06a13761da91b808ffc7dba299b3970e21775df888fc4ac2ab6
sha512 13024843836fcb4d4f43549c419f22288b612f62a50acd3cf7564baba078e957703a30d039fe1fafadfeac619442aa1cb5eb1f6974c8724ccf5a1d93e2f780af
ripemd-160 c5e2d1bd73b587f63749edaf1bce2948afef0fd4

81721330 as geometric shapes

Circle

Radius = n
Diameter 163442660
Circumference 513470259.93917
Area 2.0980736278838E+16

Sphere

Radius = n
Volume 2.2860982307811E+24
Surface area 8.392294511535E+16
Circumference 513470259.93917

Square

Length = n
Perimeter 326885320
Area 6678375776968900
Diagonal 115571413.22117

Cube

Length = n
Surface area 40070254661813400
Volume 5.4576575073368E+23
Space diagonal 141545495.6221

Equilateral Triangle

Length = n
Perimeter 245163990
Area 2.8918215394369E+15
Altitude 70772747.811051

Triangular Pyramid

Length = n
Surface area 2.8918215394369E+15
Volume 6.4319110547192E+22
Height 38523804.407056