81902013 (number)

81902013 is an odd 8-digits composite number following 81902012 and preceding 81902014. In scientific notation, it is written as 8.1902013 × 10^7. The sum of its digits is 24. It has a total of 4 prime factors and 12 positive divisors. There are 53565616 positive integers (up to 81902013) that are relatively prime to 81902013.

Interesting facts

Basic properties

Name

Name eighty-one million nine hundred two thousand thirteen

Notation

Scientific notation 8.1902013 × 10^7
Engineering notation 8.1902013 × 10^6

Prime Factorization of 81902013

Prime Factorization 3 × 53 × 53 × 9719

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 1545321
Product of the distinct prime numbers

The prime factorization of 81902013 is 3 × 53 × 53 × 9719. Since it has a total of 4 prime factors.

Most popular turbo-numbers

7, 4, 12, 48, 709, 105, 6020, 6502, 58535, 10040, 981601, 388873, 7560554, 443159, 44649610, 67778172, 995442433, 750849749, 37220709, 8122015115

Basic calculations (n = 81902013)

Multiplication

n×y
n×2 163804026
n×3 245706039
n×4 327608052
n×5 409510065

Division

n÷y
n÷2 40951006.5
n÷3 27300671
n÷3 20475503.25
n÷5 16380402.6

Exponentiation

ny
n2 6707939733452169
n3 5.4939376725242E+23
n4 4.4996455467626E+31
n5 3.6853002806635E+39

Nth Root

y√n
2√n 9049.9730938827
3√n 434.2750297206
4√n 95.131346536684
5√n 38.252419969784

Divisors of 81902013

1, 3, 53, 159, 2809, 8427, 9719, 29157, 515107, 1545321, 27300671, 81902013

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 -81902012
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 81902013 can be divided by 12 positive divisors. The sum of these divisors (counting 81902013) is 1, the average is 0.083333333333333.

Base conversion 81902013

Base System Value
2 Binary 100111000011011100110111101
3 Ternary 12201010001102220
4 Quaternary 10320123212331
5 Quinary 131431331023
6 Senary 12043235553
8 Octal 470334675
10 Decimal 81902013
12 Duodecimal 23518bb9
16 Hexadecimal 4e1b9bd
20 Vigesimal 15bhf0d
36 Base36 1crfzx

Cryptographic Hash Functions

md5 924d20a1e87c5bcb1c926069afe24b8a
sha1 d4c443b21cc31568a916427ad1e4f26e2213ceaa
sha256 d73ace32b3bb605972fe2a5adf521ad6944bbad332b8663083da63b248e7a792
sha512 45ba77bb24f2ce2e561b49d48f3faed532c525ece3956ed33e9300ff431189b7818f651277ec98cd0e0b1ff78c3f25211c034092ca600f63bcc0e7c1dcf4ea8c
ripemd-160 665c4382fdde3e25d6f559f348c8b8d89af394fa

81902013 as geometric shapes

Circle

Radius = n
Diameter 163804026
Circumference 514605524.71003
Area 2.1073614187336E+16

Sphere

Radius = n
Volume 2.3012952308376E+24
Surface area 8.4294456749346E+16
Circumference 514605524.71003

Square

Length = n
Perimeter 327608052
Area 6707939733452169
Diagonal 115826937.57026

Cube

Length = n
Surface area 40247638400713014
Volume 5.4939376725242E+23
Space diagonal 141858447.75817

Equilateral Triangle

Length = n
Perimeter 245706039
Area 2.9046231081123E+15
Altitude 70929223.879083

Triangular Pyramid

Length = n
Surface area 2.9046231081123E+15
Volume 6.4746676394301E+22
Height 38608979.190086