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

81661513 (number)

81661513 is an odd 8-digits composite number following 81661512 and preceding 81661514. In scientific notation, it is written as 8.1661513 × 10^7. The sum of its digits is 31. It has a total of 2 prime factors and 4 positive divisors. There are 79923988 positive integers (up to 81661513) that are relatively prime to 81661513.

Interesting facts

81661513 has 4 divisors, whose sum is 83399040
The reverse of 81661513 is 31516618
Previous prime number is 47

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 31
Digital Root 4

Name

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

Notation

Scientific notation	8.1661513 × 10^7
Engineering notation	8.1661513 × 10^6

Prime Factorization of 81661513

Prime Factorization 47 × 1737479

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	81661513	Product of the distinct prime numbers

The prime factorization of 81661513 is 47 × 1737479. Since it has a total of 2 prime factors.

Most popular turbo-numbers

10, 4, 39, 68, 87, 6, 6191, 9357, 28084, 16861, 553910, 590755, 9707654, 3946201, 22188789, 15375167, 339852815, 580680664, 4605957576, 8587028976

Basic calculations (n = 81661513)

Multiplication

n×y

n×2	163323026
n×3	244984539
n×4	326646052
n×5	408307565

Division

n÷y

n÷2	40830756.5
n÷3	27220504.333333
n÷3	20415378.25
n÷5	16332302.6

Exponentiation

n^y

n²	6668602705449169
n³	5.4456818652287E+23
n⁴	4.4470262043124E+31
n⁵	3.631508881948E+39

Nth Root

^y√n

²√n	9036.6759928637
³√n	433.84953939742
⁴√n	95.061432730965
⁵√n	38.229928381404

Divisors of 81661513

1, 47, 1737479, 81661513

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	-81661512	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 81661513 can be divided by 4 positive divisors. The sum of these divisors (counting 81661513) is 1, the average is 0.25.

Base conversion 81661513

Base	System	Value
2	Binary	100110111100000111001001001
3	Ternary	12200122211112111
4	Quaternary	10313200321021
5	Quinary	131401132023
6	Senary	12034142321
8	Octal	467407111
10	Decimal	81661513
12	Duodecimal	234219a1
16	Hexadecimal	4de0e49
20	Vigesimal	15a7dfd
36	Base36	1cmafd

Cryptographic Hash Functions

md5	f59107a886eafc98ba9b9cc66f57ef00
sha1	953d59ed456604179e8b64962a29427d9f022493
sha256	031a5274b5d822385b02075899c4d9572819ad31b1963f117b1edcdd7290df0a
sha512	b3aa825aa34fd97ab1fc583c7221b802a145f9f3c36889517cd2a6541f450765c905c0a3f03a8765295a13782f8eacd0d22af7875e77af1751b2ec6746bc704b
ripemd-160	482738605b783d00c557adc0a315f562c1765209

81661513 as geometric shapes

Circle

Radius = n

Diameter	163323026
Circumference	513094418.64365
Area	2.0950033269148E+16

Sphere

Radius = n

Volume	2.2810818855453E+24
Surface area	8.3800133076593E+16
Circumference	513094418.64365

Square

Length = n

Perimeter	326646052
Area	6668602705449169
Diagonal	115486819.20851

Cube

Length = n

Surface area	40011616232695014
Volume	5.4456818652287E+23
Space diagonal	141441889.53895

Equilateral Triangle

Length = n

Perimeter	244984539
Area	2.8875896753323E+15
Altitude	70720944.769473

Triangular Pyramid

Length = n

Surface area	2.8875896753323E+15
Volume	6.4177976251464E+22
Height	38495606.402836