81661572 (number)

81661572 is an even 8-digits composite number following 81661571 and preceding 81661573. In scientific notation, it is written as 8.1661572 × 10^7. The sum of its digits is 36. It has a total of 4 prime factors and 12 positive divisors. There are 27220512 positive integers (up to 81661572) that are relatively prime to 81661572.

Interesting facts

Basic properties

Name

Name eighty-one million six hundred sixty-one thousand five hundred seventy-two

Notation

Scientific notation 8.1661572 × 10^7
Engineering notation 8.1661572 × 10^6

Prime Factorization of 81661572

Prime Factorization 2 × 2 × 9 × 2268377

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 40830786
Product of the distinct prime numbers

The prime factorization of 81661572 is 2 × 2 × 9 × 2268377. Since it has a total of 4 prime factors.

Most popular turbo-numbers

10, 5, 49, 21, 487, 238, 1752, 6490, 20875, 42912, 688479, 620707, 8193726, 8459712, 86706878, 96326042, 747734733, 187360813, 6604745048, 535938842

Basic calculations (n = 81661572)

Multiplication

n×y
n×2 163323144
n×3 244984716
n×4 326646288
n×5 408307860

Division

n÷y
n÷2 40830786
n÷3 27220524
n÷3 20415393
n÷5 16332314.4

Exponentiation

ny
n2 6668612341511184
n3 5.445693668664E+23
n4 4.4470390561355E+31
n5 3.6315220006942E+39

Nth Root

y√n
2√n 9036.6792573378
3√n 433.84964388204
4√n 95.061449901302
5√n 38.229933905585

Divisors of 81661572

1, 2, 4, 9, 18, 36, 2268377, 4536754, 9073508, 20415393, 40830786, 81661572

12 divisors

τ Total Divisors 12
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81661571
Sum of the proper positive divisors of n
A Arithmetic Mean 0.083333333333333
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 12
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81661572 can be divided by 12 positive divisors. The sum of these divisors (counting 81661572) is 1, the average is 0.083333333333333.

Base conversion 81661572

Base System Value
2 Binary 100110111100000111010000100
3 Ternary 12200122211121200
4 Quaternary 10313200322010
5 Quinary 131401132242
6 Senary 12034142500
8 Octal 467407204
10 Decimal 81661572
12 Duodecimal 23421a30
16 Hexadecimal 4de0e84
20 Vigesimal 15a7dic
36 Base36 1cmah0

Cryptographic Hash Functions

md5 ca108fe4f2c5060adb4f8514b24d0e47
sha1 4b1bdb0e0f1b9114df47b762d3fd9d790a69675c
sha256 fb709c7e9a6080887b013c89ba4ed351835e0a8a71fa3478bfa05bb833bd1b04
sha512 dfe03d162702a707266752c44c86d1fe30d24116ce9c83c7a7384c5ab39136f583a2a758807d965409f382546b4f185354a49b8206091570f5edc98c34878366
ripemd-160 c17f3dabe4ef93ca04a77eac8bf2941e8e5d24c0

81661572 as geometric shapes

Circle

Radius = n
Diameter 163323144
Circumference 513094789.35159
Area 2.095006354173E+16

Sphere

Radius = n
Volume 2.2810868297567E+24
Surface area 8.3800254166919E+16
Circumference 513094789.35159

Square

Length = n
Perimeter 326646288
Area 6668612341511184
Diagonal 115486902.64711

Cube

Length = n
Surface area 40011674049067104
Volume 5.445693668664E+23
Space diagonal 141441991.72994

Equilateral Triangle

Length = n
Perimeter 244984716
Area 2.8875938478696E+15
Altitude 70720995.864972

Triangular Pyramid

Length = n
Surface area 2.8875938478696E+15
Volume 6.4178115356283E+22
Height 38495634.215702