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

81661521 (number)

81661521 is an odd 8-digits composite number following 81661520 and preceding 81661522. In scientific notation, it is written as 8.1661521 × 10^7. The sum of its digits is 30. It has a total of 2 prime factors and 4 positive divisors. There are 54441012 positive integers (up to 81661521) that are relatively prime to 81661521.

Interesting facts

81661521 has 4 divisors, whose sum is 108882032
The reverse of 81661521 is 12516618
Previous prime number is 3

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 30
Digital Root 3

Name

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

Notation

Scientific notation	8.1661521 × 10^7
Engineering notation	8.1661521 × 10^6

Prime Factorization of 81661521

Prime Factorization 3 × 27220507

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	81661521	Product of the distinct prime numbers

The prime factorization of 81661521 is 3 × 27220507. Since it has a total of 2 prime factors.

Most popular turbo-numbers

10, 9, 37, 47, 839, 99, 7554, 175, 7960, 2360, 862866, 841606, 3400744, 2670769, 84174737, 23979321, 916692960, 302108065, 2121653253, 8148380176

Basic calculations (n = 81661521)

Multiplication

n×y

n×2	163323042
n×3	244984563
n×4	326646084
n×5	408307605

Division

n÷y

n÷2	40830760.5
n÷3	27220507
n÷3	20415380.25
n÷5	16332304.2

Exponentiation

n^y

n²	6668604012033441
n³	5.4456834656935E+23
n⁴	4.4470279469309E+31
n⁵	3.6315106607588E+39

Nth Root

^y√n

²√n	9036.6764355044
³√n	433.84955356482
⁴√n	95.061435059147
⁵√n	38.229929130446

Divisors of 81661521

1, 3, 27220507, 81661521

4 divisors

τ	Total Divisors	4	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-81661520	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.25	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	4	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81661521 can be divided by 4 positive divisors. The sum of these divisors (counting 81661521) is 1, the average is 0.25.

Base conversion 81661521

Base	System	Value
2	Binary	100110111100000111001010001
3	Ternary	12200122211112210
4	Quaternary	10313200321101
5	Quinary	131401132041
6	Senary	12034142333
8	Octal	467407121
10	Decimal	81661521
12	Duodecimal	234219a9
16	Hexadecimal	4de0e51
20	Vigesimal	15a7dg1
36	Base36	1cmafl

Cryptographic Hash Functions

md5	45ac6940f4b3acf305ca68664d7e3dfa
sha1	74f596f3fc234459ac84e798f8997ea9d4327d95
sha256	783dd2966e79c0e2730f3764168b934f52ad744227df560d217c8485efc17341
sha512	d1041d1c840775942e3b9dbcd181d0594e265f2632a2b4740ee045d6f7a8f65149363908dd99db5953c51bc722bb010a6dd2a300d684f968a361e639212915ac
ripemd-160	4b5d5fd0c5d991c30fe5db051268707d38363065

81661521 as geometric shapes

Circle

Radius = n

Diameter	163323042
Circumference	513094468.90914
Area	2.0950037373904E+16

Sphere

Radius = n

Volume	2.2810825559464E+24
Surface area	8.3800149495615E+16
Circumference	513094468.90914

Square

Length = n

Perimeter	326646084
Area	6668604012033441
Diagonal	115486830.52222

Cube

Length = n

Surface area	40011624072200646
Volume	5.4456834656935E+23
Space diagonal	141441903.39535

Equilateral Triangle

Length = n

Perimeter	244984563
Area	2.8875902410999E+15
Altitude	70720951.697676

Triangular Pyramid

Length = n

Surface area	2.8875902410999E+15
Volume	6.4177995113123E+22
Height	38495610.174072