81505725 (number)

81505725 is an odd 8-digits composite number following 81505724 and preceding 81505726. In scientific notation, it is written as 8.1505725 × 10^7. The sum of its digits is 33. It has a total of 5 prime factors and 24 positive divisors. There are 35294400 positive integers (up to 81505725) that are relatively prime to 81505725.

Interesting facts

Basic properties

Name

Name eighty-one million five hundred five thousand seven hundred twenty-five

Notation

Scientific notation 8.1505725 × 10^7
Engineering notation 8.1505725 × 10^6

Prime Factorization of 81505725

Prime Factorization 21 × 19 × 5 × 5 × 8171

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 16301145
Product of the distinct prime numbers

The prime factorization of 81505725 is 21 × 19 × 5 × 5 × 8171. Since it has a total of 5 prime factors.

Most popular turbo-numbers

2, 8, 28, 60, 313, 530, 1686, 7052, 77464, 13280, 313028, 182600, 89898, 3608321, 78373889, 77450798, 449640242, 227866482, 5641778621, 3677461066

Basic calculations (n = 81505725)

Multiplication

n×y
n×2 163011450
n×3 244517175
n×4 326022900
n×5 407528625

Division

n÷y
n÷2 40752862.5
n÷3 27168575
n÷3 20376431.25
n÷5 16301145

Exponentiation

ny
n2 6643183207775625
n3 5.4145746365758E+23
n4 4.4131883132072E+31
n5 3.5970011302948E+39

Nth Root

y√n
2√n 9028.0521154898
3√n 433.57347471948
4√n 95.016062407836
5√n 38.215330772652

Divisors of 81505725

1, 5, 19, 21, 25, 95, 105, 399, 475, 525, 1995, 8171, 9975, 40855, 155249, 171591, 204275, 776245, 857955, 3260229, 3881225, 4289775, 16301145, 81505725

24 divisors

τ Total Divisors 24
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81505724
Sum of the proper positive divisors of n
A Arithmetic Mean 0.041666666666667
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 24
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81505725 can be divided by 24 positive divisors. The sum of these divisors (counting 81505725) is 1, the average is 0.041666666666667.

Base conversion 81505725

Base System Value
2 Binary 100110110111010110110111101
3 Ternary 12200100220211120
4 Quaternary 10312322312331
5 Quinary 131331140400
6 Senary 12030541153
8 Octal 466726675
10 Decimal 81505725
12 Duodecimal 233677b9
16 Hexadecimal 4dbadbd
20 Vigesimal 1598465
36 Base36 1ciy7x

Cryptographic Hash Functions

md5 8fde65ce8925f42e01edb93d9f24fbfc
sha1 a495ce0e6833c1e01daf22e2b5908ac614ab8a97
sha256 e54f65a282f9800e8cb5e719d06e39a4988da4fd550339608275557aa14c81f6
sha512 2c2dc92fb65bd9b0113a696da7fcc6349469e876a8e7fc84a463bf720b001e60b69b96d9c7efd4b337fe7c7b2929e3b555fc7ae07619d2787973e575a3785612
ripemd-160 09fa68b3f97e3b47fd3d024b1ddb79627fd36a84

81505725 as geometric shapes

Circle

Radius = n
Diameter 163011450
Circumference 512115573.77102
Area 2.0870175561999E+16

Sphere

Radius = n
Volume 2.2680517200773E+24
Surface area 8.3480702247996E+16
Circumference 512115573.77102

Square

Length = n
Perimeter 326022900
Area 6643183207775625
Diagonal 115266501.70605

Cube

Length = n
Surface area 39859099246653750
Volume 5.4145746365758E+23
Space diagonal 141172056.80774

Equilateral Triangle

Length = n
Perimeter 244517175
Area 2.8765827099639E+15
Altitude 70586028.403868

Triangular Pyramid

Length = n
Surface area 2.8765827099639E+15
Volume 6.3811374046057E+22
Height 38422167.235351