81505540 (number)

81505540 is an even 8-digits composite number following 81505539 and preceding 81505541. In scientific notation, it is written as 8.1505540 × 10^7. The sum of its digits is 28. It has a total of 5 prime factors and 24 positive divisors. There are 31806720 positive integers (up to 81505540) that are relatively prime to 81505540.

Interesting facts

Basic properties

Name

Name eighty-one million five hundred five thousand five hundred forty

Notation

Scientific notation 8.1505540 × 10^7
Engineering notation 8.1505540 × 10^6

Prime Factorization of 81505540

Prime Factorization 2 × 2 × 5 × 41 × 99397

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 40752770
Product of the distinct prime numbers

The prime factorization of 81505540 is 2 × 2 × 5 × 41 × 99397. Since it has a total of 5 prime factors.

Most popular turbo-numbers

5, 1, 48, 86, 277, 984, 5825, 6589, 64124, 2784, 318277, 932920, 4207176, 4298097, 9813516, 66804374, 412645614, 824236561, 9070392120, 6893800482

Basic calculations (n = 81505540)

Multiplication

n×y
n×2 163011080
n×3 244516620
n×4 326022160
n×5 407527700

Division

n÷y
n÷2 40752770
n÷3 27168513.333333
n÷3 20376385
n÷5 16301108

Exponentiation

ny
n2 6643153050691600
n3 5.4145377669927E+23
n4 4.4131482454913E+31
n5 3.5969603084882E+39

Nth Root

y√n
2√n 9028.0418696415
3√n 433.57314668055
4√n 95.016008491419
5√n 38.215313424564

Divisors of 81505540

1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 99397, 198794, 397588, 496985, 993970, 1987940, 4075277, 8150554, 16301108, 20376385, 40752770, 81505540

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 -81505539
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 81505540 can be divided by 24 positive divisors. The sum of these divisors (counting 81505540) is 1, the average is 0.041666666666667.

Base conversion 81505540

Base System Value
2 Binary 100110110111010110100000100
3 Ternary 12200100220120201
4 Quaternary 10312322310010
5 Quinary 131331134130
6 Senary 12030540244
8 Octal 466726404
10 Decimal 81505540
12 Duodecimal 23367684
16 Hexadecimal 4dbad04
20 Vigesimal 15983h0
36 Base36 1ciy2s

Cryptographic Hash Functions

md5 46abe15ffda66f8a3a18dec8c2715b87
sha1 d0df26f3f63a3a3e51f8c5d862d99e5fff13e060
sha256 bef429a60f207cbb5269555a0d405f391cc95fa4abea4fc81432523e62fc9874
sha512 f64514ad1e567ecee85fefa3336bb1742055029992e2711b32651c19ab31249db8de9a6393889277a41aefed00cd9e6999ff89940171cc8ccd31c407fdf4983c
ripemd-160 8cacf33a77c8bb4c4b7351e92a08d0dcf142d060

81505540 as geometric shapes

Circle

Radius = n
Diameter 163011080
Circumference 512114411.38174
Area 2.0870080820725E+16

Sphere

Radius = n
Volume 2.2680362761825E+24
Surface area 8.3480323282901E+16
Circumference 512114411.38174

Square

Length = n
Perimeter 326022160
Area 6643153050691600
Diagonal 115266240.07654

Cube

Length = n
Surface area 39858918304149600
Volume 5.4145377669927E+23
Space diagonal 141171736.37834

Equilateral Triangle

Length = n
Perimeter 244516620
Area 2.8765696515635E+15
Altitude 70585868.189169

Triangular Pyramid

Length = n
Surface area 2.8765696515635E+15
Volume 6.3810939533853E+22
Height 38422080.025514