21491855 (number)

21491855 is an odd 8-digits composite number following 21491854 and preceding 21491856. In scientific notation, it is written as 2.1491855 × 10^7. The sum of its digits is 35. It has a total of 4 prime factors and 16 positive divisors. There are 13397280 positive integers (up to 21491855) that are relatively prime to 21491855.

Interesting facts

Basic properties

Name

Name twenty-one million four hundred ninety-one thousand eight hundred fifty-five

Notation

Scientific notation 2.1491855 × 10^7
Engineering notation 2.1491855 × 10^6

Prime Factorization of 21491855

Prime Factorization 5 × 7 × 11 × 55823

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 21491855
Product of the distinct prime numbers

The prime factorization of 21491855 is 5 × 7 × 11 × 55823. Since it has a total of 4 prime factors.

Most popular turbo-numbers

10, 4, 72, 34, 616, 597, 3865, 4388, 81810, 77519, 951082, 228208, 8800802, 7946770, 52921905, 72644156, 497015994, 549005395, 9992997522, 1612453462

Basic calculations (n = 21491855)

Multiplication

n×y
n×2 42983710
n×3 64475565
n×4 85967420
n×5 107459275

Division

n÷y
n÷2 10745927.5
n÷3 7163951.6666667
n÷3 5372963.75
n÷5 4298371

Exponentiation

ny
n2 461899831341025
n3 9.9270841997058E+21
n4 2.1335145419287E+29
n5 4.5853185175522E+36

Nth Root

y√n
2√n 4635.9308666114
3√n 278.02977011556
4√n 68.087670444886
5√n 29.272160677535

Divisors of 21491855

1, 5, 7, 11, 35, 55, 77, 385, 55823, 279115, 390761, 614053, 1953805, 3070265, 4298371, 21491855

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21491854
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
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 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21491855 can be divided by 16 positive divisors. The sum of these divisors (counting 21491855) is 1, the average is 0.0625.

Base conversion 21491855

Base System Value
2 Binary 1010001111111000010001111
3 Ternary 1111102220021122
4 Quaternary 1101333002033
5 Quinary 21000214410
6 Senary 2044351155
8 Octal 121770217
10 Decimal 21491855
12 Duodecimal 72454bb
16 Hexadecimal 147f08f
20 Vigesimal 6e69cf
36 Base36 csn7z

Cryptographic Hash Functions

md5 14de5d140f67e0aacdc24aaa359b8dc6
sha1 bf9737120e8cb95ee70e26e29d4772fba93622bc
sha256 0d9ea1fe45c64211de104e0c6a803fee1b4ce3d9a4bba2ec2be83fff2f252ac0
sha512 8827caca1c3a3c3ad6f9fb95a293968c5ffd0e477b3d3994729da5aeab6507ae9c47e2954ea4b866b2106d40a0de0b7db051862272d932094ace36bb413e826b
ripemd-160 aa8b1ee829421b832729a3adbfb82ad0ebc8f722

21491855 as geometric shapes

Circle

Radius = n
Diameter 42983710
Circumference 135037307.56003
Area 1.4511011168353E+15

Sphere

Radius = n
Volume 4.1582473057817E+22
Surface area 5.8044044673413E+15
Circumference 135037307.56003

Square

Length = n
Perimeter 85967420
Area 461899831341025
Diagonal 30394072.821556

Cube

Length = n
Surface area 2771398988046150
Volume 9.9270841997058E+21
Space diagonal 37224984.808903

Equilateral Triangle

Length = n
Perimeter 64475565
Area 2.0000849397254E+14
Altitude 18612492.404452

Triangular Pyramid

Length = n
Surface area 2.0000849397254E+14
Volume 1.1699180925036E+21
Height 10131357.607185