81591490 (number)

81591490 is an even 8-digits composite number following 81591489 and preceding 81591491. In scientific notation, it is written as 8.1591490 × 10^7. The sum of its digits is 37. It has a total of 5 prime factors and 32 positive divisors. There are 32015424 positive integers (up to 81591490) that are relatively prime to 81591490.

Interesting facts

Basic properties

Name

Name eighty-one million five hundred ninety-one thousand four hundred ninety

Notation

Scientific notation 8.1591490 × 10^7
Engineering notation 8.1591490 × 10^6

Prime Factorization of 81591490

Prime Factorization 2 × 5 × 83 × 197 × 499

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 81591490
Product of the distinct prime numbers

The prime factorization of 81591490 is 2 × 5 × 83 × 197 × 499. Since it has a total of 5 prime factors.

Most popular turbo-numbers

8, 6, 87, 76, 157, 519, 7924, 9086, 12586, 33576, 385760, 754380, 1695526, 8573152, 44948850, 74636597, 676712960, 5773064, 1989484689, 6699920791

Basic calculations (n = 81591490)

Multiplication

n×y
n×2 163182980
n×3 244774470
n×4 326365960
n×5 407957450

Division

n÷y
n÷2 40795745
n÷3 27197163.333333
n÷3 20397872.5
n÷5 16318298

Exponentiation

ny
n2 6657171240420100
n3 5.4316852069102E+23
n4 4.4317928924276E+31
n5 3.6159658546458E+39

Nth Root

y√n
2√n 9032.8007838101
3√n 433.72549837098
4√n 95.041047888847
5√n 38.223369862394

Divisors of 81591490

1, 2, 5, 10, 83, 166, 197, 394, 415, 499, 830, 985, 998, 1970, 2495, 4990, 16351, 32702, 41417, 81755, 82834, 98303, 163510, 196606, 207085, 414170, 491515, 983030, 8159149, 16318298, 40795745, 81591490

32 divisors

τ Total Divisors 32
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81591489
Sum of the proper positive divisors of n
A Arithmetic Mean 0.03125
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 32
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81591490 can be divided by 32 positive divisors. The sum of these divisors (counting 81591490) is 1, the average is 0.03125.

Base conversion 81591490

Base System Value
2 Binary 100110111001111110011000010
3 Ternary 12200112021111001
4 Quaternary 10313033303002
5 Quinary 131341411430
6 Senary 12032442214
8 Octal 467176302
10 Decimal 81591490
12 Duodecimal 233a936a
16 Hexadecimal 4dcfcc2
20 Vigesimal 159iiea
36 Base36 1cksea

Cryptographic Hash Functions

md5 dad6f4cb596bfb978e93f90fb064b28f
sha1 cbdf76996244f3ba34751aa58efb20dc4b3d7a19
sha256 18237d6354cb33c3cc01a113c6319c184e666521032b7197e3ea2f202643371d
sha512 fd6d540c7f364fd046a33736bee7fc91a4419903f6753908e788398acd8aa35710a4097447f882539ec529b11c6801bc7502be75738ea81b4d455377a5e27d01
ripemd-160 0a265c6c5825b9f98ca155a578c125eb1a0c68d4

81591490 as geometric shapes

Circle

Radius = n
Diameter 163182980
Circumference 512654451.15889
Area 2.0914120262593E+16

Sphere

Radius = n
Volume 2.2752189790189E+24
Surface area 8.3656481050372E+16
Circumference 512654451.15889

Square

Length = n
Perimeter 326365960
Area 6657171240420100
Diagonal 115387791.73223

Cube

Length = n
Surface area 39943027442520600
Volume 5.4316852069102E+23
Space diagonal 141320606.14525

Equilateral Triangle

Length = n
Perimeter 244774470
Area 2.8826397057735E+15
Altitude 70660303.072624

Triangular Pyramid

Length = n
Surface area 2.8826397057735E+15
Volume 6.4013024051281E+22
Height 38462597.244076