21031781 (number)

21031781 is an odd 8-digits prime number following 21031780 and preceding 21031782. In scientific notation, it is written as 2.1031781 × 10^7. The sum of its digits is 23. It has a total of 1 prime factors and 2 positive divisors. There are 21031780 positive integers (up to 21031781) that are relatively prime to 21031781.

Interesting facts

Basic properties

Name

Name twenty-one million thirty-one thousand seven hundred eighty-one

Notation

Scientific notation 2.1031781 × 10^7
Engineering notation 2.1031781 × 10^6

Prime Factorization of 21031781

Prime Factorization 21031781

Composite number
ω Distinct Factors 1
Total number of distinct prime factors
Ω Total Factors 1
Total number of prime factors
rad Radical 21031781
Product of the distinct prime numbers

The prime factorization of 21031781 is 21031781. Since it has a total of 1 prime factors.

Most popular turbo-numbers

4, 1, 24, 20, 210, 695, 1262, 9078, 42589, 19905, 821822, 871312, 3373400, 4021715, 80274789, 1904759, 479733803, 177266993, 5929032254, 1454809028

Basic calculations (n = 21031781)

Multiplication

n×y
n×2 42063562
n×3 63095343
n×4 84127124
n×5 105158905

Division

n÷y
n÷2 10515890.5
n÷3 7010593.6666667
n÷3 5257945.25
n÷5 4206356.2

Exponentiation

ny
n2 442335812031961
n3 9.3031099271134E+21
n4 1.9566097060597E+29
n5 4.1150986840323E+36

Nth Root

y√n
2√n 4586.0419753857
3√n 276.03152426451
4√n 67.720321731263
5√n 29.14574830833

Divisors of 21031781

1, 21031781

2 divisors

τ Total Divisors 2
Total number of the positive divisors of n
σ Sum of Divisors 21031782
Sum of all the positive divisors of n
s Aliquot Sum 1
Sum of the proper positive divisors of n
A Arithmetic Mean 10515891
Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G Geometric Mean 4586.0420844122
Returns the nth root of the product of n divisors
H Harmonic Mean 1.9999999049058
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21031781 can be divided by 2 positive divisors. The sum of these divisors (counting 21031781) is 21031782, the average is 10515891.

Base conversion 21031781

Base System Value
2 Binary 1010000001110101101100101
3 Ternary 1110120112011212
4 Quaternary 1100032231211
5 Quinary 20341004111
6 Senary 2030441205
8 Octal 120165545
10 Decimal 21031781
12 Duodecimal 7063205
16 Hexadecimal 140eb65
20 Vigesimal 6b8j91
36 Base36 cis85

Cryptographic Hash Functions

md5 b9d0d9a592c7b55b7317bf6e1d59e974
sha1 92de68e441fc517a391c6ba9f205aaf64b0e0c86
sha256 c54adc43e73330f29258c796c59394f1f81e0f88a3cc45f3a4d23f0ba8684154
sha512 38d053e4bd0bfc862fd38c4188127ff2d2aee45933efab218e5fe478f5de9cc80fec660d5bc56f54603d4aca34f1452abfe83da9a90453772258cbfa403f8ebe
ripemd-160 748b0b8e9b2d6f72d303fa66a4ea15d802111b17

21031781 as geometric shapes

Circle

Radius = n
Diameter 42063562
Circumference 132146577.36302
Area 1.3896389374993E+15

Sphere

Radius = n
Volume 3.8968775736744E+22
Surface area 5.5585557499971E+15
Circumference 132146577.36302

Square

Length = n
Perimeter 84127124
Area 442335812031961
Diagonal 29743429.931061

Cube

Length = n
Surface area 2654014872191766
Volume 9.3031099271134E+21
Space diagonal 36428113.265662

Equilateral Triangle

Length = n
Perimeter 63095343
Area 1.9153702511165E+14
Altitude 18214056.632831

Triangular Pyramid

Length = n
Surface area 1.9153702511165E+14
Volume 1.0963820192643E+21
Height 9914476.6436869