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

81561421 (number)

81561421 is an odd 8-digits prime number following 81561420 and preceding 81561422. In scientific notation, it is written as 8.1561421 × 10^7. The sum of its digits is 28. It has a total of 1 prime factors and 2 positive divisors. There are 81561420 positive integers (up to 81561421) that are relatively prime to 81561421.

Interesting facts

81561421 has 2 divisors, whose sum is 81561422
The reverse of 81561421 is 12416518
Previous prime number is 1

Basic properties

Is Prime? yes
Number parity odd
Number length 8
Sum of Digits 28
Digital Root 1

Name

Name	eighty-one million five hundred sixty-one thousand four hundred twenty-one

Notation

Scientific notation	8.1561421 × 10^7
Engineering notation	8.1561421 × 10^6

Prime Factorization of 81561421

Prime Factorization 81561421

Composite number

ω	Distinct Factors	1	Total number of distinct prime factors
Ω	Total Factors	1	Total number of prime factors
rad	Radical	81561421	Product of the distinct prime numbers

The prime factorization of 81561421 is 81561421. Since it has a total of 1 prime factors.

Most popular turbo-numbers

2, 1, 51, 19, 327, 810, 4701, 3407, 33493, 39292, 748835, 532181, 6849302, 219886, 66152813, 44686721, 78764733, 735959631, 1196237989, 2085230015

Basic calculations (n = 81561421)

Multiplication

n×y

n×2	163122842
n×3	244684263
n×4	326245684
n×5	407807105

Division

n÷y

n÷2	40780710.5
n÷3	27187140.333333
n÷3	20390355.25
n÷5	16312284.2

Exponentiation

n^y

n²	6652265395539241
n³	5.4256821852931E+23
n⁴	4.4252634892689E+31
n⁵	3.6093077848419E+39

Nth Root

^y√n

²√n	9031.1361965148
³√n	433.67221138224
⁴√n	95.032290283434
⁵√n	38.220552147035

Divisors of 81561421

1, 81561421

2 divisors

τ	Total Divisors	2	Total number of the positive divisors of n
σ	Sum of Divisors	81561422	Sum of all the positive divisors of n
s	Aliquot Sum	1	Sum of the proper positive divisors of n
A	Arithmetic Mean	40780711	Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G	Geometric Mean	9031.1362518788	Returns the nth root of the product of n divisors
H	Harmonic Mean	1.9999999754786	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81561421 can be divided by 2 positive divisors. The sum of these divisors (counting 81561421) is 81561422, the average is 40780711.

Base conversion 81561421

Base	System	Value
2	Binary	100110111001000011101001101
3	Ternary	12200110202020101
4	Quaternary	10313020131031
5	Quinary	131334431141
6	Senary	12032051101
8	Octal	467103515
10	Decimal	81561421
12	Duodecimal	23393a91
16	Hexadecimal	4dc874d
20	Vigesimal	159f3b1
36	Base36	1ck571

Cryptographic Hash Functions

md5	c89ef7a55988cdb8bc3e7370973b9f6e
sha1	1fb080afa54ef59afb5f111342bf39dc8bc0342f
sha256	fb4d524d5655ad7e902503b71840765002fb62e787520b1756dbf553f7b6571a
sha512	15dec858cf2f566ffb400cb13b8fb126166273430c03327ea1ade3e13a4713b28de4ba98cb43aceea3b27d22387b256fcd559f9a1042d90cadc1de29f7c38c2f
ripemd-160	3357318a00e05009f985c842e728a9a2f51b9189

81561421 as geometric shapes

Circle

Radius = n

Diameter	163122842
Circumference	512465522.05989
Area	2.0898708096356E+16

Sphere

Radius = n

Volume	2.272704439204E+24
Surface area	8.3594832385423E+16
Circumference	512465522.05989

Square

Length = n

Perimeter	326245684
Area	6652265395539241
Diagonal	115345267.74462

Cube

Length = n

Surface area	39913592373235446
Volume	5.4256821852931E+23
Space diagonal	141268525.10952

Equilateral Triangle

Length = n

Perimeter	244684263
Area	2.8805154126266E+15
Altitude	70634262.554758

Triangular Pyramid

Length = n

Surface area	2.8805154126266E+15
Volume	6.3942277763063E+22
Height	38448422.581541