21491290 (number)

21491290 is an even 8-digits composite number following 21491289 and preceding 21491291. In scientific notation, it is written as 2.1491290 × 10^7. The sum of its digits is 28. It has a total of 4 prime factors and 16 positive divisors. There are 8584704 positive integers (up to 21491290) that are relatively prime to 21491290.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 2.1491290 × 10^7
Engineering notation 2.1491290 × 10^6

Prime Factorization of 21491290

Prime Factorization 2 × 5 × 1657 × 1297

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 21491290
Product of the distinct prime numbers

The prime factorization of 21491290 is 2 × 5 × 1657 × 1297. Since it has a total of 4 prime factors.

Most popular turbo-numbers

2, 6, 24, 70, 885, 282, 3878, 6813, 87920, 71781, 752231, 466587, 8519202, 2485229, 39139436, 61153357, 385037058, 163826944, 7141522603, 9705908638

Basic calculations (n = 21491290)

Multiplication

n×y
n×2 42982580
n×3 64473870
n×4 85965160
n×5 107456450

Division

n÷y
n÷2 10745645
n÷3 7163763.3333333
n÷3 5372822.5
n÷5 4298258

Exponentiation

ny
n2 461875545864100
n3 9.9263013000737E+21
n4 2.1332901986726E+29
n5 4.5847158313831E+36

Nth Root

y√n
2√n 4635.8699291503
3√n 278.02733371664
4√n 68.087222950788
5√n 29.27200676858

Divisors of 21491290

1, 2, 5, 10, 1297, 1657, 2594, 3314, 6485, 8285, 12970, 16570, 2149129, 4298258, 10745645, 21491290

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21491289
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
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 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21491290 can be divided by 16 positive divisors. The sum of these divisors (counting 21491290) is 1, the average is 0.0625.

Base conversion 21491290

Base System Value
2 Binary 1010001111110111001011010
3 Ternary 1111102212111201
4 Quaternary 1101332321122
5 Quinary 21000210130
6 Senary 2044344414
8 Octal 121767132
10 Decimal 21491290
12 Duodecimal 724510a
16 Hexadecimal 147ee5a
20 Vigesimal 6e684a
36 Base36 csmsa

Cryptographic Hash Functions

md5 5159fe1a8a1cece64222a6da90869ad5
sha1 013ee3a9ce4eb7a3fec0f4b940bfe02c34e251c1
sha256 65c84e98161a9cd2b8705904f946f232f4652aff323569dc1a114ef455409e99
sha512 43e5b940bbde8ce7f3b344699e5e81c59ddbcc587793fe3644174ce51ed1586a95992b1bb92b7eadb1b5194cb825c3864a49b5dc5bb94a3e174c08a72e0c4788
ripemd-160 6e45dd5ea41148333a6fdd3dd0ee8c67d9319d91

21491290 as geometric shapes

Circle

Radius = n
Diameter 42982580
Circumference 135033757.56034
Area 1.4510248217594E+15

Sphere

Radius = n
Volume 4.1579193655507E+22
Surface area 5.8040992870377E+15
Circumference 135033757.56034

Square

Length = n
Perimeter 85965160
Area 461875545864100
Diagonal 30393273.790893

Cube

Length = n
Surface area 2771253275184600
Volume 9.9263013000737E+21
Space diagonal 37224006.200197

Equilateral Triangle

Length = n
Perimeter 64473870
Area 1.9999797805256E+14
Altitude 18612003.100098

Triangular Pyramid

Length = n
Surface area 1.9999797805256E+14
Volume 1.1698258268972E+21
Height 10131091.263631