21951 (number)

21951 is an odd 5-digits composite number following 21950 and preceding 21952. In scientific notation, it is written as 2.1951 × 10^4. The sum of its digits is 18. It has a total of 3 prime factors and 6 positive divisors. There are 14580 positive integers (up to 21951) that are relatively prime to 21951.

Interesting facts

Basic properties

Name

Name twenty-one thousand nine hundred fifty-one

Notation

Scientific notation 2.1951 × 10^4
Engineering notation 2.1951 × 10^3

Prime Factorization of 21951

Prime Factorization 9 × 9 × 271

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 2439
Product of the distinct prime numbers

The prime factorization of 21951 is 9 × 9 × 271. Since it has a total of 3 prime factors.

Most popular turbo-numbers

6, 6, 21, 93, 866, 93, 9668, 8020, 1509, 3445, 74953, 438239, 2528212, 7569441, 35176886, 44078593, 925682309, 66888071, 9522235510, 6540278205

Basic calculations (n = 21951)

Multiplication

n×y
n×2 43902
n×3 65853
n×4 87804
n×5 109755

Division

n÷y
n÷2 10975.5
n÷3 7317
n÷3 5487.75
n÷5 4390.2

Exponentiation

ny
n2 481846401
n3 10577010348351
n4 232175954156652801
n5 5.0964943696927E+21

Nth Root

y√n
2√n 148.15869869839
3√n 27.999574823476
4√n 12.172045789365
5√n 7.3839859549799

Divisors of 21951

1, 9, 81, 271, 2439, 21951

6 divisors

τ Total Divisors 6
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21950
Sum of the proper positive divisors of n
A Arithmetic Mean 0.16666666666667
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 6
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21951 can be divided by 6 positive divisors. The sum of these divisors (counting 21951) is 1, the average is 0.16666666666667.

Base conversion 21951

Base System Value
2 Binary 101010110111111
3 Ternary 1010010000
4 Quaternary 11112333
5 Quinary 1200301
6 Senary 245343
8 Octal 52677
10 Decimal 21951
12 Duodecimal 10853
16 Hexadecimal 55bf
20 Vigesimal 2ehb
36 Base36 gxr

Cryptographic Hash Functions

md5 ae8bddcb177c34849249800dc684ac2c
sha1 98eedcaa5c74156794f3ce0aa4eb0164af77901d
sha256 4dff3deeab17d79dfa2d83f937b590f67b5ec0a49e5d322fbdab0220e77ddfb0
sha512 ba6399275b7dec67e94a8ec6c43c6754d81d675cad8531028e0cff3114c705c6942f1a6a5100a0966768faaaad898e80d6e57e11d3e310d8df29b5fe8deb0997
ripemd-160 06b78e4e272dd95e780d49de3a8a88fb73abba6b

21951 as geometric shapes

Circle

Radius = n
Diameter 43902
Circumference 137922.2006779
Area 1513765113.5403

Sphere

Radius = n
Volume 44304877343097
Surface area 6055060454.1611
Circumference 137922.2006779

Square

Length = n
Perimeter 87804
Area 481846401
Diagonal 31043.401907652

Cube

Length = n
Surface area 2891078406
Volume 10577010348351
Space diagonal 38020.247276944

Equilateral Triangle

Length = n
Perimeter 65853
Area 208645611.99405
Altitude 19010.123638472

Triangular Pyramid

Length = n
Surface area 208645611.99405
Volume 1246512623666.5
Height 10347.800635884