81231490 (number)

81231490 is an even 8-digits composite number following 81231489 and preceding 81231491. In scientific notation, it is written as 8.1231490 × 10^7. The sum of its digits is 28. It has a total of 4 prime factors and 16 positive divisors. There are 32411520 positive integers (up to 81231490) that are relatively prime to 81231490.

Interesting facts

Basic properties

Name

Name eighty-one million two hundred thirty-one thousand four hundred ninety

Notation

Scientific notation 8.1231490 × 10^7
Engineering notation 8.1231490 × 10^6

Prime Factorization of 81231490

Prime Factorization 2 × 5 × 409 × 19861

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81231490
Product of the distinct prime numbers

The prime factorization of 81231490 is 2 × 5 × 409 × 19861. Since it has a total of 4 prime factors.

Most popular turbo-numbers

7, 7, 42, 95, 10, 88, 1086, 3323, 28665, 425, 811773, 141747, 2664973, 7182492, 5054769, 3017105, 987885693, 27566441, 8439149134, 8719121952

Basic calculations (n = 81231490)

Multiplication

n×y
n×2 162462980
n×3 243694470
n×4 324925960
n×5 406157450

Division

n÷y
n÷2 40615745
n÷3 27077163.333333
n÷3 20307872.5
n÷5 16246298

Exponentiation

ny
n2 6598554967620100
n3 5.3601045186668E+23
n4 4.3540927660704E+31
n5 3.5368944298612E+39

Nth Root

y√n
2√n 9012.8513801127
3√n 433.08665973999
4√n 94.936038363272
5√n 38.189580154039

Divisors of 81231490

1, 2, 5, 10, 409, 818, 2045, 4090, 19861, 39722, 99305, 198610, 8123149, 16246298, 40615745, 81231490

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 -81231489
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 81231490 can be divided by 16 positive divisors. The sum of these divisors (counting 81231490) is 1, the average is 0.0625.

Base conversion 81231490

Base System Value
2 Binary 100110101110111111010000010
3 Ternary 12122211222122201
4 Quaternary 10311313322002
5 Quinary 131243401430
6 Senary 12021023414
8 Octal 465677202
10 Decimal 81231490
12 Duodecimal 23254b6a
16 Hexadecimal 4d77e82
20 Vigesimal 157diea
36 Base36 1cd2ma

Cryptographic Hash Functions

md5 a4936162cd7427a451387617138c9cb0
sha1 22aabdbf82bef98ba350dbe9591985e4928cf3de
sha256 310f3e85e8028c5be1f83b97ff9f47afc187daccec6b2f674f8ebdadead6ccfb
sha512 3be3cd12c7173775f022a13e0de0c622e963e8bf4b173587c0e4ffc4d8b6148b9ff1c5080de32813fedb18ced353400e11e84a3648402c8e67785bc4013a317d
ripemd-160 21ad4fb4c6b2dec520276d76c79d6eee6c45c8a2

81231490 as geometric shapes

Circle

Radius = n
Diameter 162462980
Circumference 510392504.44831
Area 2.0729971810584E+16

Sphere

Radius = n
Volume 2.2452353304423E+24
Surface area 8.2919887242335E+16
Circumference 510392504.44831

Square

Length = n
Perimeter 324925960
Area 6598554967620100
Diagonal 114878674.84977

Cube

Length = n
Surface area 39591329805720600
Volume 5.3601045186668E+23
Space diagonal 140697067.85452

Equilateral Triangle

Length = n
Perimeter 243694470
Area 2.8572581151135E+15
Altitude 70348533.927262

Triangular Pyramid

Length = n
Surface area 2.8572581151135E+15
Volume 6.3169437550299E+22
Height 38292891.616591