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

21491891 (number)

21491891 is an odd 8-digits composite number following 21491890 and preceding 21491892. In scientific notation, it is written as 2.1491891 × 10^7. The sum of its digits is 35. It has a total of 2 prime factors and 4 positive divisors. There are 21279000 positive integers (up to 21491891) that are relatively prime to 21491891.

Interesting facts

21491891 has 4 divisors, whose sum is 21704784
The reverse of 21491891 is 19819412
Previous prime number is 101

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 35
Digital Root 8

Name

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

Notation

Scientific notation	2.1491891 × 10^7
Engineering notation	2.1491891 × 10^6

Prime Factorization of 21491891

Prime Factorization 101 × 212791

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	21491891	Product of the distinct prime numbers

The prime factorization of 21491891 is 101 × 212791. Since it has a total of 2 prime factors.

Most popular turbo-numbers

5, 9, 17, 59, 922, 243, 8334, 1160, 79437, 32291, 414610, 369264, 175000, 576177, 50344735, 55679245, 34766152, 894059318, 216397397, 6172834037

Basic calculations (n = 21491891)

Multiplication

n×y

n×2	42983782
n×3	64475673
n×4	85967564
n×5	107459455

Division

n÷y

n÷2	10745945.5
n÷3	7163963.6666667
n÷3	5372972.75
n÷5	4298378.2

Exponentiation

n^y

n²	461901378755881
n³	9.9271340849711E+21
n⁴	2.1335288369658E+29
n⁵	4.5853569209427E+36

Nth Root

^y√n

²√n	4635.9347493251
³√n	278.02992535369
⁴√n	68.087698957485
⁵√n	29.272170484014

Divisors of 21491891

1, 101, 212791, 21491891

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	-21491890	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 21491891 can be divided by 4 positive divisors. The sum of these divisors (counting 21491891) is 1, the average is 0.25.

Base conversion 21491891

Base	System	Value
2	Binary	1010001111111000010110011
3	Ternary	1111102220022222
4	Quaternary	1101333002303
5	Quinary	21000220031
6	Senary	2044351255
8	Octal	121770263
10	Decimal	21491891
12	Duodecimal	724552b
16	Hexadecimal	147f0b3
20	Vigesimal	6e69eb
36	Base36	csn8z

Cryptographic Hash Functions

md5	fbb5926c9e8fd7251de9f521f21c6ddb
sha1	d9efca4c210f367994f62f766b8233dd3a68eb8a
sha256	7620c376cd2d224481aa654b039a553324d02986fa4ebb3766f0bf5dfffd5219
sha512	1ad9e6aec27859b84597fec4b0ad403605bde538867c7277534280b7322398c858316cf75eaab7b7998d5f9203230c8e0799c4ba090252cd04211038de137ffa
ripemd-160	c789bb9ab87fc49e2be10a74d2f78c87e3233a20

21491891 as geometric shapes

Circle

Radius = n

Diameter	42983782
Circumference	135037533.75471
Area	1.4511059781825E+15

Sphere

Radius = n

Volume	4.1582682016728E+22
Surface area	5.8044239127299E+15
Circumference	135037533.75471

Square

Length = n

Perimeter	85967564
Area	461901378755881
Diagonal	30394123.733244

Cube

Length = n

Surface area	2771408272535286
Volume	9.9271340849711E+21
Space diagonal	37225047.162732

Equilateral Triangle

Length = n

Perimeter	64475673
Area	2.0000916402283E+14
Altitude	18612523.581366

Triangular Pyramid

Length = n

Surface area	2.0000916402283E+14
Volume	1.1699239715385E+21
Height	10131374.577748