81509715 (number)

81509715 is an odd 8-digits composite number following 81509714 and preceding 81509716. In scientific notation, it is written as 8.1509715 × 10^7. The sum of its digits is 36. It has a total of 4 prime factors and 16 positive divisors. There are 35297856 positive integers (up to 81509715) that are relatively prime to 81509715.

Interesting facts

Basic properties

Name

Name eighty-one million five hundred nine thousand seven hundred fifteen

Notation

Scientific notation 8.1509715 × 10^7
Engineering notation 8.1509715 × 10^6

Prime Factorization of 81509715

Prime Factorization 21 × 15 × 19 × 13619

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81509715
Product of the distinct prime numbers

The prime factorization of 81509715 is 21 × 15 × 19 × 13619. Since it has a total of 4 prime factors.

Most popular turbo-numbers

10, 9, 97, 79, 207, 511, 4895, 754, 69555, 31780, 339180, 20879, 617338, 9383799, 23702977, 12544697, 692725203, 263365435, 9951530840, 4021264688

Basic calculations (n = 81509715)

Multiplication

n×y
n×2 163019430
n×3 244529145
n×4 326038860
n×5 407548575

Division

n÷y
n÷2 40754857.5
n÷3 27169905
n÷3 20377428.75
n÷5 16301943

Exponentiation

ny
n2 6643833639381225
n3 5.4153698645338E+23
n4 4.4140525427774E+31
n5 3.5978816475681E+39

Nth Root

y√n
2√n 9028.2730906857
3√n 433.58054960056
4√n 95.017225231459
5√n 38.215704921055

Divisors of 81509715

1, 15, 19, 21, 285, 315, 399, 5985, 13619, 204285, 258761, 285999, 3881415, 4289985, 5433981, 81509715

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 -81509714
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 81509715 can be divided by 16 positive divisors. The sum of these divisors (counting 81509715) is 1, the average is 0.0625.

Base conversion 81509715

Base System Value
2 Binary 100110110111011110101010011
3 Ternary 12200101010022100
4 Quaternary 10312323311103
5 Quinary 131331302330
6 Senary 12031011443
8 Octal 466736523
10 Decimal 81509715
12 Duodecimal 23369b83
16 Hexadecimal 4dbbd53
20 Vigesimal 1598e5f
36 Base36 1cj1ar

Cryptographic Hash Functions

md5 411d0a376386f4411990ae46708e484d
sha1 e7725faf9b449b094dafed142008813b97dd03a9
sha256 16377dd140a8b39e84d9af354b95f5473deb16130ce5e73cc32339b870574c29
sha512 0d942300fb3eb4da5c8150883fab3c5c775af521b4c1c29f98cc56dd1f461f5aec7f98cab75286e9c01c24ef374c8f1e5fed565a7a6465a7d3ad08926eda4282
ripemd-160 e6e492fb550fdb23d4dff06e24385f419bbba5e2

81509715 as geometric shapes

Circle

Radius = n
Diameter 163019430
Circumference 512140643.6804
Area 2.0872218953153E+16

Sphere

Radius = n
Volume 2.2683848243854E+24
Surface area 8.3488875812611E+16
Circumference 512140643.6804

Square

Length = n
Perimeter 326038860
Area 6643833639381225
Diagonal 115272144.41817

Cube

Length = n
Surface area 39863001836287350
Volume 5.4153698645338E+23
Space diagonal 141178967.69046

Equilateral Triangle

Length = n
Perimeter 244529145
Area 2.8768643551109E+15
Altitude 70589483.84523

Triangular Pyramid

Length = n
Surface area 2.8768643551109E+15
Volume 6.3820745897418E+22
Height 38424048.139389