81015890 (number)

81015890 is an even 8-digits composite number following 81015889 and preceding 81015891. In scientific notation, it is written as 8.1015890 × 10^7. The sum of its digits is 32. It has a total of 5 prime factors and 32 positive divisors. There are 30792960 positive integers (up to 81015890) that are relatively prime to 81015890.

Interesting facts

Basic properties

Name

Name eighty-one million fifteen thousand eight hundred ninety

Notation

Scientific notation 8.1015890 × 10^7
Engineering notation 8.1015890 × 10^6

Prime Factorization of 81015890

Prime Factorization 2 × 5 × 23 × 2161 × 163

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 81015890
Product of the distinct prime numbers

The prime factorization of 81015890 is 2 × 5 × 23 × 2161 × 163. Since it has a total of 5 prime factors.

Most popular turbo-numbers

5, 4, 99, 87, 17, 82, 9214, 5300, 91462, 3430, 583275, 960768, 9996514, 2624632, 94745628, 28420317, 830370557, 751758085, 6251205721, 4540888027

Basic calculations (n = 81015890)

Multiplication

n×y
n×2 162031780
n×3 243047670
n×4 324063560
n×5 405079450

Division

n÷y
n÷2 40507945
n÷3 27005296.666667
n÷3 20253972.5
n÷5 16203178

Exponentiation

ny
n2 6563574432492100
n3 5.3175382422959E+23
n4 4.3080509330864E+31
n5 3.4902058050933E+39

Nth Root

y√n
2√n 9000.8827344878
3√n 432.70316226167
4√n 94.872982110229
5√n 38.169286475401

Divisors of 81015890

1, 2, 5, 10, 23, 46, 115, 163, 230, 326, 815, 1630, 2161, 3749, 4322, 7498, 10805, 18745, 21610, 37490, 49703, 99406, 248515, 352243, 497030, 704486, 1761215, 3522430, 8101589, 16203178, 40507945, 81015890

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 -81015889
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 81015890 can be divided by 32 positive divisors. The sum of these divisors (counting 81015890) is 1, the average is 0.03125.

Base conversion 81015890

Base System Value
2 Binary 100110101000011010001010010
3 Ternary 12122110000220112
4 Quaternary 10311003101102
5 Quinary 131220002030
6 Senary 12012241322
8 Octal 465032122
10 Decimal 81015890
12 Duodecimal 23170242
16 Hexadecimal 4d43452
20 Vigesimal 1566jea
36 Base36 1c8g9e

Cryptographic Hash Functions

md5 7e38bc82cae23bcf15c91d63421a0b49
sha1 ee563284e62791cd0adcba99fa5d32fb4bb63cd9
sha256 28f140bc8bf41611ad8df92b0f35f93b903fbaee8b971fd7c9f7ca2d0b080685
sha512 87568af4c6772ab20a91cfaf60618d7fbe836a40aac084eeea12075e1fdd71540638316f154248d080de85f82535bd714b4877dad31546d16a86b138280301ba
ripemd-160 fdf9650af52a76deeca602280073b53e6db376b5

81015890 as geometric shapes

Circle

Radius = n
Diameter 162031780
Circumference 509037849.69608
Area 2.0620077218407E+16

Sphere

Radius = n
Volume 2.2274052102906E+24
Surface area 8.2480308873628E+16
Circumference 509037849.69608

Square

Length = n
Perimeter 324063560
Area 6563574432492100
Diagonal 114573770.40573

Cube

Length = n
Surface area 39381446594952600
Volume 5.3175382422959E+23
Space diagonal 140323637.70041

Equilateral Triangle

Length = n
Perimeter 243047670
Area 2.8421110990841E+15
Altitude 70161818.850206

Triangular Pyramid

Length = n
Surface area 2.8421110990841E+15
Volume 6.2667789172437E+22
Height 38191256.801909