21081391 (number)

21081391 is an odd 8-digits composite number following 21081390 and preceding 21081392. In scientific notation, it is written as 2.1081391 × 10^7. The sum of its digits is 25. It has a total of 2 prime factors and 4 positive divisors. There are 20784400 positive integers (up to 21081391) that are relatively prime to 21081391.

Interesting facts

Basic properties

Name

Name twenty-one million eighty-one thousand three hundred ninety-one

Notation

Scientific notation 2.1081391 × 10^7
Engineering notation 2.1081391 × 10^6

Prime Factorization of 21081391

Prime Factorization 71 × 296921

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 21081391
Product of the distinct prime numbers

The prime factorization of 21081391 is 71 × 296921. Since it has a total of 2 prime factors.

Most popular turbo-numbers

7, 7, 72, 8, 992, 399, 9648, 3132, 70150, 49885, 256856, 97932, 4778938, 1693470, 90676085, 84794684, 958904389, 221870428, 3732229201, 6325058361

Basic calculations (n = 21081391)

Multiplication

n×y
n×2 42162782
n×3 63244173
n×4 84325564
n×5 105406955

Division

n÷y
n÷2 10540695.5
n÷3 7027130.3333333
n÷3 5270347.75
n÷5 4216278.2

Exponentiation

ny
n2 444425046494881
n3 9.3690981753518E+21
n4 1.9751362195198E+29
n5 4.1638618921958E+36

Nth Root

y√n
2√n 4591.44759308
3√n 276.24838925373
4√n 67.760221318115
5√n 29.159485216676

Divisors of 21081391

1, 71, 296921, 21081391

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 -21081390
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 21081391 can be divided by 4 positive divisors. The sum of these divisors (counting 21081391) is 1, the average is 0.25.

Base conversion 21081391

Base System Value
2 Binary 1010000011010110100101111
3 Ternary 1110200001020021
4 Quaternary 1100122310233
5 Quinary 20344101031
6 Senary 2031503011
8 Octal 120326457
10 Decimal 21081391
12 Duodecimal 7087a67
16 Hexadecimal 141ad2f
20 Vigesimal 6bf39b
36 Base36 cjui7

Cryptographic Hash Functions

md5 a13c42d8c39c0a6c1bf53e155b7ba2d5
sha1 2281241ccd3d065e85e92754ef1824e435e51889
sha256 79b3dcafae1fb9f5a9f33c1470e3889ec69e52049bb59fe5ba5ea1ba510ebc52
sha512 99cd7b0c51a26622c8708faf8260caf4e7a0fdb770093c684b3885fbdff9eb9f4ed3de28400c6f7c8cf972e8ff6686f383347717e1335e331a6c1e73b263ca75
ripemd-160 fe82b60c1e7516474f86b11e77cca20c763317e6

21081391 as geometric shapes

Circle

Radius = n
Diameter 42162782
Circumference 132458286.18611
Area 1.3962024611396E+15

Sphere

Radius = n
Volume 3.9245186664596E+22
Surface area 5.5848098445585E+15
Circumference 132458286.18611

Square

Length = n
Perimeter 84325564
Area 444425046494881
Diagonal 29813589.06589

Cube

Length = n
Surface area 2666550278969286
Volume 9.3690981753518E+21
Space diagonal 36514040.306225

Equilateral Triangle

Length = n
Perimeter 63244173
Area 1.9244169017132E+14
Altitude 18257020.153113

Triangular Pyramid

Length = n
Surface area 1.9244169017132E+14
Volume 1.104158808899E+21
Height 9937863.0219634