81640215 (number)

81640215 is an odd 8-digits composite number following 81640214 and preceding 81640216. In scientific notation, it is written as 8.1640215 × 10^7. The sum of its digits is 27. It has a total of 4 prime factors and 16 positive divisors. There are 43459584 positive integers (up to 81640215) that are relatively prime to 81640215.

Interesting facts

Basic properties

Name

Name eighty-one million six hundred forty thousand two hundred fifteen

Notation

Scientific notation 8.1640215 × 10^7
Engineering notation 8.1640215 × 10^6

Prime Factorization of 81640215

Prime Factorization 9 × 5 × 659 × 2753

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81640215
Product of the distinct prime numbers

The prime factorization of 81640215 is 9 × 5 × 659 × 2753. Since it has a total of 4 prime factors.

Most popular turbo-numbers

5, 6, 78, 96, 910, 77, 45, 2908, 71359, 59521, 538599, 67702, 6024363, 3194066, 32045975, 87901769, 521472314, 908089231, 3437479033, 9796944057

Basic calculations (n = 81640215)

Multiplication

n×y
n×2 163280430
n×3 244920645
n×4 326560860
n×5 408201075

Division

n÷y
n÷2 40820107.5
n÷3 27213405
n÷3 20410053.75
n÷5 16328043

Exponentiation

ny
n2 6665124705246225
n3 5.4414221393811E+23
n4 4.4423887336484E+31
n5 3.6267757132863E+39

Nth Root

y√n
2√n 9035.4974959877
3√n 433.81181893169
4√n 95.055233922113
5√n 38.227934036846

Divisors of 81640215

1, 5, 9, 45, 659, 2753, 3295, 5931, 13765, 24777, 29655, 123885, 1814227, 9071135, 16328043, 81640215

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 -81640214
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 81640215 can be divided by 16 positive divisors. The sum of these divisors (counting 81640215) is 1, the average is 0.0625.

Base conversion 81640215

Base System Value
2 Binary 100110111011011101100010111
3 Ternary 12200121202022200
4 Quaternary 10313123230113
5 Quinary 131344441330
6 Senary 12033455543
8 Octal 467335427
10 Decimal 81640215
12 Duodecimal 234115b3
16 Hexadecimal 4ddbb17
20 Vigesimal 15a50af
36 Base36 1cltzr

Cryptographic Hash Functions

md5 f84d31927a570012bef2649c8a9d105c
sha1 da5e88b8ea22d0e60ad26a365b7a256eb0dea455
sha256 6a1135d0c195c40ee8c6e237a1053c05e37e84c81d793157cdd025f959241a7f
sha512 e6dc6a3254cdffef910f600be9fce2b3fc263fc5014c7ca70b9947005d973ab03e9c1085fa9d9a8b81be96e720bb9a7943ab634ad02cfa1ae34d3b5eb0cef37d
ripemd-160 a915e27131d760b02e13a35671efb20c9bd8a763

81640215 as geometric shapes

Circle

Radius = n
Diameter 163280430
Circumference 512960599.36298
Area 2.0939106809261E+16

Sphere

Radius = n
Volume 2.2792975757548E+24
Surface area 8.3756427237046E+16
Circumference 512960599.36298

Square

Length = n
Perimeter 326560860
Area 6665124705246225
Diagonal 115456699.28806

Cube

Length = n
Surface area 39990748231477350
Volume 5.4414221393811E+23
Space diagonal 141405000.32085

Equilateral Triangle

Length = n
Perimeter 244920645
Area 2.8860836570672E+15
Altitude 70702500.160423

Triangular Pyramid

Length = n
Surface area 2.8860836570672E+15
Volume 6.4127774900917E+22
Height 38485566.429352