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

81291281 (number)

81291281 is an odd 8-digits prime number following 81291280 and preceding 81291282. In scientific notation, it is written as 8.1291281 × 10^7. The sum of its digits is 32. It has a total of 1 prime factors and 2 positive divisors. There are 81291280 positive integers (up to 81291281) that are relatively prime to 81291281.

Interesting facts

81291281 has 2 divisors, whose sum is 81291282
The reverse of 81291281 is 18219218
Previous prime number is 1

Basic properties

Is Prime? yes
Number parity odd
Number length 8
Sum of Digits 32
Digital Root 5

Name

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

Notation

Scientific notation	8.1291281 × 10^7
Engineering notation	8.1291281 × 10^6

Prime Factorization of 81291281

Prime Factorization 81291281

Composite number

ω	Distinct Factors	1	Total number of distinct prime factors
Ω	Total Factors	1	Total number of prime factors
rad	Radical	81291281	Product of the distinct prime numbers

The prime factorization of 81291281 is 81291281. Since it has a total of 1 prime factors.

Most popular turbo-numbers

6, 6, 38, 57, 666, 925, 8385, 7100, 4871, 13767, 601792, 969792, 4367333, 2173567, 9684634, 59834635, 858490045, 67058557, 4867784078, 896664008

Basic calculations (n = 81291281)

Multiplication

n×y

n×2	162582562
n×3	243873843
n×4	325165124
n×5	406456405

Division

n÷y

n÷2	40645640.5
n÷3	27097093.666667
n÷3	20322820.25
n÷5	16258256.2

Exponentiation

n^y

n²	6608272366620961
n³	5.3719492587952E+23
n⁴	4.3669263671446E+31
n⁵	3.5499303841786E+39

Nth Root

^y√n

²√n	9016.1677557597
³√n	433.19289249016
⁴√n	94.953503125265
⁵√n	38.19520044046

Divisors of 81291281

1, 81291281

2 divisors

τ	Total Divisors	2	Total number of the positive divisors of n
σ	Sum of Divisors	81291282	Sum of all the positive divisors of n
s	Aliquot Sum	1	Sum of the proper positive divisors of n
A	Arithmetic Mean	40645641	Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G	Geometric Mean	9016.1678112156	Returns the nth root of the product of n divisors
H	Harmonic Mean	1.9999999753971	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81291281 can be divided by 2 positive divisors. The sum of these divisors (counting 81291281) is 81291282, the average is 40645641.

Base conversion 81291281

Base	System	Value
2	Binary	100110110000110100000010001
3	Ternary	12122222000200012
4	Quaternary	10312012200101
5	Quinary	131302310111
6	Senary	12022204305
8	Octal	466064021
10	Decimal	81291281
12	Duodecimal	23283695
16	Hexadecimal	4d86811
20	Vigesimal	1581841
36	Base36	1cecr5

Cryptographic Hash Functions

md5	e6675f62f3807604b77460dc87c15736
sha1	8d8d25984a5abbbf14465ea255effeb4b1d1bace
sha256	6f9084e0ebd9536973ffdcde32219d0e6cec83e986ba7e1b88a73a752fbaaaa1
sha512	338e64ebe3b5471c302d07013edfb460f9a3fd7eedc4415ee2910c023c56decc806d19eac82b98010190c6ea0f3249ac1dadedfbc7e7171d5a752dd18bc2426c
ripemd-160	22298674ffc0b7b7dd034885edd53827f4bcb917

81291281 as geometric shapes

Circle

Radius = n

Diameter	162582562
Circumference	510768182.38101
Area	2.0760499919897E+16

Sphere

Radius = n

Volume	2.2501968435851E+24
Surface area	8.3041999679587E+16
Circumference	510768182.38101

Square

Length = n

Perimeter	325165124
Area	6608272366620961
Diagonal	114963232.09288

Cube

Length = n

Surface area	39649634199725766
Volume	5.3719492587952E+23
Space diagonal	140800628.90436

Equilateral Triangle

Length = n

Perimeter	243873843
Area	2.8614658723102E+15
Altitude	70400314.452179

Triangular Pyramid

Length = n

Surface area	2.8614658723102E+15
Volume	6.3309029151402E+22
Height	38321077.364294