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

21491721 (number)

21491721 is an odd 8-digits composite number following 21491720 and preceding 21491722. In scientific notation, it is written as 2.1491721 × 10^7. The sum of its digits is 27. It has a total of 2 prime factors and 4 positive divisors. There are 14327808 positive integers (up to 21491721) that are relatively prime to 21491721.

Interesting facts

21491721 has 4 divisors, whose sum is 23879700
The reverse of 21491721 is 12719412
Previous prime number is 9

Basic properties

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

Name

Name	twenty-one million four hundred ninety-one thousand seven hundred twenty-one

Notation

Scientific notation	2.1491721 × 10^7
Engineering notation	2.1491721 × 10^6

Prime Factorization of 21491721

Prime Factorization 9 × 2387969

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	21491721	Product of the distinct prime numbers

The prime factorization of 21491721 is 9 × 2387969. Since it has a total of 2 prime factors.

Most popular turbo-numbers

9, 3, 1, 60, 476, 852, 6839, 3146, 63587, 79576, 150892, 324095, 2837595, 6574508, 8573203, 58814754, 237162339, 183281767, 8055837389, 5230690975

Basic calculations (n = 21491721)

Multiplication

n×y

n×2	42983442
n×3	64475163
n×4	85966884
n×5	107458605

Division

n÷y

n÷2	10745860.5
n÷3	7163907
n÷3	5372930.25
n÷5	4298344.2

Exponentiation

n^y

n²	461894071541841
n³	9.9268985171313E+21
n⁴	2.133461333255E+29
n⁵	4.5851755738604E+36

Nth Root

^y√n

²√n	4635.9164142594
³√n	278.02919228322
⁴√n	68.08756431434
⁵√n	29.272124175527

Divisors of 21491721

1, 9, 2387969, 21491721

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	-21491720	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 21491721 can be divided by 4 positive divisors. The sum of these divisors (counting 21491721) is 1, the average is 0.25.

Base conversion 21491721

Base	System	Value
2	Binary	1010001111111000000001001
3	Ternary	1111102220002200
4	Quaternary	1101333000021
5	Quinary	21000213341
6	Senary	2044350413
8	Octal	121770011
10	Decimal	21491721
12	Duodecimal	7245409
16	Hexadecimal	147f009
20	Vigesimal	6e6961
36	Base36	csn49

Cryptographic Hash Functions

md5	c0f3e30aee505db98ca9ae9f7e0ce028
sha1	216b81bdc545653302a8b49578244f7ce71a5997
sha256	3c756c31d8430356427a7b3fc14715c3296f6262ac02b8eb1910e6c238ffb5c0
sha512	1cca5ff869869ef993fc89037710950d5f09cce2f98701e253dcaae82de89e12201b18e0fadaae76bc8d99951601447d5e37c59db029cba6c75d5059cd86cd43
ripemd-160	175c820954b281fdfc064c851730d3859a22b227

21491721 as geometric shapes

Circle

Radius = n

Diameter	42983442
Circumference	135036465.6132
Area	1.4510830218925E+15

Sphere

Radius = n

Volume	4.1581695272468E+22
Surface area	5.8043320875701E+15
Circumference	135036465.6132

Square

Length = n

Perimeter	85966884
Area	461894071541841
Diagonal	30393883.316939

Cube

Length = n

Surface area	2771364429251046
Volume	9.9268985171313E+21
Space diagonal	37224752.714095

Equilateral Triangle

Length = n

Perimeter	64475163
Area	2.0000599990633E+14
Altitude	18612376.357047

Triangular Pyramid

Length = n

Surface area	2.0000599990633E+14
Volume	1.1698962096024E+21
Height	10131294.43898