21531905 (number)

21531905 is an odd 8-digits composite number following 21531904 and preceding 21531906. In scientific notation, it is written as 2.1531905 × 10^7. The sum of its digits is 26. It has a total of 2 prime factors and 4 positive divisors. There are 17225520 positive integers (up to 21531905) that are relatively prime to 21531905.

Interesting facts

Basic properties

Name

Name twenty-one million five hundred thirty-one thousand nine hundred five

Notation

Scientific notation 2.1531905 × 10^7
Engineering notation 2.1531905 × 10^6

Prime Factorization of 21531905

Prime Factorization 5 × 4306381

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 21531905
Product of the distinct prime numbers

The prime factorization of 21531905 is 5 × 4306381. Since it has a total of 2 prime factors.

Most popular turbo-numbers

8, 1, 31, 99, 236, 142, 1051, 6456, 49283, 70514, 383615, 424653, 7308380, 1094250, 86796748, 89790730, 342978567, 123080663, 9350866246, 6886098254

Basic calculations (n = 21531905)

Multiplication

n×y
n×2 43063810
n×3 64595715
n×4 86127620
n×5 107659525

Division

n÷y
n÷2 10765952.5
n÷3 7177301.6666667
n÷3 5382976.25
n÷5 4306381

Exponentiation

ny
n2 463622932929025
n3 9.9826849476491E+21
n4 2.1494622393771E+29
n5 4.6282016739355E+36

Nth Root

y√n
2√n 4640.2483769729
3√n 278.20236546559
4√n 68.119368589065
5√n 29.283062269257

Divisors of 21531905

1, 5, 4306381, 21531905

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 -21531904
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 21531905 can be divided by 4 positive divisors. The sum of these divisors (counting 21531905) is 1, the average is 0.25.

Base conversion 21531905

Base System Value
2 Binary 1010010001000110100000001
3 Ternary 1111111221012222
4 Quaternary 1102020310001
5 Quinary 21003010110
6 Senary 2045300425
8 Octal 122106401
10 Decimal 21531905
12 Duodecimal 7264715
16 Hexadecimal 1488d01
20 Vigesimal 6eb9f5
36 Base36 cti4h

Cryptographic Hash Functions

md5 136e44a5f49e1b61624f99866ee03f62
sha1 19c586dd82c78cbaaae5a07d0c82e10ca130f477
sha256 bc52c5f15d90c5cab13ce7b8b01d2070bba88988462548de9de5f4086df287e2
sha512 ce540e6b41918b92509325c5d140cf9b2039942ee13d413dcbceab1f609874e4156ac2acff9f8f48e7025701af9cf6686ddd9930e390479a40285ec95f880580
ripemd-160 85432cf7a8a50d07bea5914b542651e338ca5f56

21531905 as geometric shapes

Circle

Radius = n
Diameter 43063810
Circumference 135288949.13159
Area 1.4565144001256E+15

Sphere

Radius = n
Volume 4.1815372926181E+22
Surface area 5.8260576005023E+15
Circumference 135288949.13159

Square

Length = n
Perimeter 86127620
Area 463622932929025
Diagonal 30450712.074729

Cube

Length = n
Surface area 2781737597574150
Volume 9.9826849476491E+21
Space diagonal 37294353.443746

Equilateral Triangle

Length = n
Perimeter 64595715
Area 2.0075461884679E+14
Altitude 18647176.721873

Triangular Pyramid

Length = n
Surface area 2.0075461884679E+14
Volume 1.1764707034886E+21
Height 10150237.358243