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

81291213 (number)

81291213 is an odd 8-digits composite number following 81291212 and preceding 81291214. In scientific notation, it is written as 8.1291213 × 10^7. The sum of its digits is 27. It has a total of 3 prime factors and 6 positive divisors. There are 54194136 positive integers (up to 81291213) that are relatively prime to 81291213.

Interesting facts

81291213 has 6 divisors, whose sum is 117420654
The reverse of 81291213 is 31219218
Previous prime number is 3

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 27
Digital Root 9

Name

Name	eighty-one million two hundred ninety-one thousand two hundred thirteen

Notation

Scientific notation	8.1291213 × 10^7
Engineering notation	8.1291213 × 10^6

Prime Factorization of 81291213

Prime Factorization 3 × 3 × 9032357

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	27097071	Product of the distinct prime numbers

The prime factorization of 81291213 is 3 × 3 × 9032357. Since it has a total of 3 prime factors.

Most popular turbo-numbers

1, 4, 37, 17, 63, 996, 3479, 644, 80232, 7331, 635386, 32166, 5211099, 7588755, 88466053, 77555113, 812087672, 496619878, 3577851317, 9178095681

Basic calculations (n = 81291213)

Multiplication

n×y

n×2	162582426
n×3	243873639
n×4	325164852
n×5	406456065

Division

n÷y

n÷2	40645606.5
n÷3	27097071
n÷3	20322803.25
n÷5	16258242.6

Exponentiation

n^y

n²	6608261311011369
n³	5.3719357779308E+23
n⁴	4.366911755461E+31
n⁵	3.5499155366538E+39

Nth Root

^y√n

²√n	9016.1639847554
³√n	433.19277170179
⁴√n	94.953483268153
⁵√n	38.195194050415

Divisors of 81291213

1, 3, 9, 9032357, 27097071, 81291213

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	-81291212	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 81291213 can be divided by 6 positive divisors. The sum of these divisors (counting 81291213) is 1, the average is 0.16666666666667.

Base conversion 81291213

Base	System	Value
2	Binary	100110110000110011111001101
3	Ternary	12122222000120200
4	Quaternary	10312012133031
5	Quinary	131302304323
6	Senary	12022204113
8	Octal	466063715
10	Decimal	81291213
12	Duodecimal	23283639
16	Hexadecimal	4d867cd
20	Vigesimal	158180d
36	Base36	1cecp9

Cryptographic Hash Functions

md5	9a5fce7af07010dad42565eb0db01dc9
sha1	be3f6dbb33bf192f0ec61d00b906aee8f24d3707
sha256	3326a12a782693b1e9d31387dec368fc9a4e2c0d40e90a5afee862d37488cba1
sha512	6632c084637ac4addb413069c48fcb5fa6c038daad135a8d48152f482b27cf7fd319fb86c9dbc1b51f64ec33a213424a50120c94e834c530702a94b5b2dc837e
ripemd-160	c3861a732c3e969270718c65f608060c21a00705

81291213 as geometric shapes

Circle

Radius = n

Diameter	162582426
Circumference	510767755.12441
Area	2.0760465187675E+16

Sphere

Radius = n

Volume	2.2501911967338E+24
Surface area	8.30418607507E+16
Circumference	510767755.12441

Square

Length = n

Perimeter	325164852
Area	6608261311011369
Diagonal	114963135.92636

Cube

Length = n

Surface area	39649567866068214
Volume	5.3719357779308E+23
Space diagonal	140800511.1249

Equilateral Triangle

Length = n

Perimeter	243873639
Area	2.8614610850909E+15
Altitude	70400255.562452

Triangular Pyramid

Length = n

Surface area	2.8614610850909E+15
Volume	6.3308870277892E+22
Height	38321045.308787