Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

81330391 (number)

81330391 is an odd 8-digits composite number following 81330390 and preceding 81330392. In scientific notation, it is written as 8.1330391 × 10^7. The sum of its digits is 28. It has a total of 3 prime factors and 6 positive divisors. There are 78705900 positive integers (up to 81330391) that are relatively prime to 81330391.

Interesting facts

81330391 has 6 divisors, whose sum is 84039576
The reverse of 81330391 is 19303318
Previous prime number is 31

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 28
Digital Root 1

Name

Name	eighty-one million three hundred thirty thousand three hundred ninety-one

Notation

Scientific notation	8.1330391 × 10^7
Engineering notation	8.1330391 × 10^6

Prime Factorization of 81330391

Prime Factorization 31 × 31 × 84631

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	2623561	Product of the distinct prime numbers

The prime factorization of 81330391 is 31 × 31 × 84631. Since it has a total of 3 prime factors.

Most popular turbo-numbers

4, 6, 51, 54, 630, 822, 231, 91, 88977, 68309, 217848, 525229, 5562493, 144220, 20019418, 95297089, 766905375, 904569514, 9327011866, 8847081637

Basic calculations (n = 81330391)

Multiplication

n×y

n×2	162660782
n×3	243991173
n×4	325321564
n×5	406651955

Division

n÷y

n÷2	40665195.5
n÷3	27110130.333333
n÷3	20332597.75
n÷5	16266078.2

Exponentiation

n^y

n²	6614632500212881
n³	5.3797064756362E+23
n⁴	4.3753363112873E+31
n⁵	3.5584781295349E+39

Nth Root

^y√n

²√n	9018.3363765165
³√n	433.26235241063
⁴√n	94.964921821252
⁵√n	38.198874947439

Divisors of 81330391

1, 31, 961, 84631, 2623561, 81330391

6 divisors

τ	Total Divisors	6	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-81330390	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.16666666666667	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	6	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81330391 can be divided by 6 positive divisors. The sum of these divisors (counting 81330391) is 1, the average is 0.16666666666667.

Base conversion 81330391

Base	System	Value
2	Binary	100110110010000000011010111
3	Ternary	12200001000022201
4	Quaternary	10312100003113
5	Quinary	131310033031
6	Senary	12023105331
8	Octal	466200327
10	Decimal	81330391
12	Duodecimal	232a2247
16	Hexadecimal	4d900d7
20	Vigesimal	15865jb
36	Base36	1cf6xj

Cryptographic Hash Functions

md5	05b8978b934fed0788f6deba7f229a23
sha1	930c92f71c852159d8edcf27aae2b771ad154f3c
sha256	b693b7df36570da503e5ac58d8919ffeb98685edcab3bb790650da0447a8b77d
sha512	0ba615c5eebcaa3492d74e414764c241626ad71cad6a25cfad99fb54d3f17c1cfb1e4df75434d54ecbb08fd5e3b765d79c5d2c33cd05f231fe611000190f8b34
ripemd-160	bb68352618f122dfd0fbc2fde42e17455b35e9f1

81330391 as geometric shapes

Circle

Radius = n

Diameter	162660782
Circumference	511013917.75837
Area	2.0780480868865E+16

Sphere

Radius = n

Volume	2.2534461789771E+24
Surface area	8.312192347546E+16
Circumference	511013917.75837

Square

Length = n

Perimeter	325321564
Area	6614632500212881
Diagonal	115018541.98531

Cube

Length = n

Surface area	39687795001277286
Volume	5.3797064756362E+23
Space diagonal	140868369.41144

Equilateral Triangle

Length = n

Perimeter	243991173
Area	2.8642198909413E+15
Altitude	70434184.705721

Triangular Pyramid

Length = n

Surface area	2.8642198909413E+15
Volume	6.3400448828592E+22
Height	38339513.995102