21921 (number)

21921 is an odd 5-digits composite number following 21920 and preceding 21922. In scientific notation, it is written as 2.1921 × 10^4. The sum of its digits is 15. It has a total of 2 prime factors and 4 positive divisors. There are 14612 positive integers (up to 21921) that are relatively prime to 21921.

Interesting facts

Basic properties

Name

Name twenty-one thousand nine hundred twenty-one

Notation

Scientific notation 2.1921 × 10^4
Engineering notation 2.1921 × 10^3

Prime Factorization of 21921

Prime Factorization 3 × 7307

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 21921
Product of the distinct prime numbers

The prime factorization of 21921 is 3 × 7307. Since it has a total of 2 prime factors.

Most popular turbo-numbers

10, 8, 48, 90, 475, 823, 5033, 7176, 33043, 23685, 753214, 161853, 1117409, 643303, 98927037, 52303105, 56323796, 525039472, 8862389918, 3580066153

Basic calculations (n = 21921)

Multiplication

n×y
n×2 43842
n×3 65763
n×4 87684
n×5 109605

Division

n÷y
n÷2 10960.5
n÷3 7307
n÷3 5480.25
n÷5 4384.2

Exponentiation

ny
n2 480530241
n3 10533703412961
n4 230909312515518081
n5 5.0617630396527E+21

Nth Root

y√n
2√n 148.05742129323
3√n 27.986813518749
4√n 12.167884832346
5√n 7.3819665410431

Divisors of 21921

1, 3, 7307, 21921

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 -21920
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 21921 can be divided by 4 positive divisors. The sum of these divisors (counting 21921) is 1, the average is 0.25.

Base conversion 21921

Base System Value
2 Binary 101010110100001
3 Ternary 1010001220
4 Quaternary 11112201
5 Quinary 1200141
6 Senary 245253
8 Octal 52641
10 Decimal 21921
12 Duodecimal 10829
16 Hexadecimal 55a1
20 Vigesimal 2eg1
36 Base36 gwx

Cryptographic Hash Functions

md5 78e249f2f806ede8a4f3bd522f3035c2
sha1 0ded90e679ccbc248ddd4f03dc1d8c64c3b46950
sha256 ceb7c7000949242d03bcb3896fc335039add459d44a6633a2f0bef1cbe5532ad
sha512 78bb3906564a4db6874fb99efcfa91d3cb6cf8444cd1589033cfdb90165c27643605bdcb3a7cf1086a8e5b01fcda74907d966520740a1f0a1933a5383e023de5
ripemd-160 b2ca2885d0b84b7bc35baa0f4059b142bbd8252e

21921 as geometric shapes

Circle

Radius = n
Diameter 43842
Circumference 137733.70511868
Area 1509630274.9533

Sphere

Radius = n
Volume 44123473676336
Surface area 6038521099.8133
Circumference 137733.70511868

Square

Length = n
Perimeter 87684
Area 480530241
Diagonal 31000.975500781

Cube

Length = n
Surface area 2883181446
Volume 10533703412961
Space diagonal 37968.285752717

Equilateral Triangle

Length = n
Perimeter 65763
Area 208075697.99633
Altitude 18984.142876359

Triangular Pyramid

Length = n
Surface area 208075697.99633
Volume 1241408852385.4
Height 10333.65850026