21751990

21,751,990 is an even composite number composed of five prime numbers multiplied together.

What does the number 21751990 look like?

This visualization shows the relationship between its 5 prime factors (large circles) and 48 divisors.

21751990 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of forty-eight divisors.

Prime factorization of 21751990:

2 × 5 × 13² × 61 × 211

(2 × 5 × 13 × 13 × 61 × 211)

See below for interesting mathematical facts about the number 21751990 from the Numbermatics database.

Names of 21751990

Cardinal: 21751990 can be written as Twenty-one million, seven hundred fifty-one thousand, nine hundred ninety.

Scientific notation

Scientific notation: 2.175199 × 10⁷

Factors of 21751990

Number of distinct prime factors ω(n): 5
Total number of prime factors Ω(n): 6
Sum of prime factors: 292

Divisors of 21751990

Number of divisors d(n): 48
Complete list of divisors:
1 2 5 10 13 26 61 65 122 130 169 211 305 338 422 610 793 845 1055 1586 1690 2110 2743 3965 5486 7930 10309 12871 13715 20618 25742 27430 35659 51545 64355 71318 103090 128710 167323 178295 334646 356590 836615 1673230 2175199 4350398 10875995 21751990
Sum of all divisors σ(n): 43296336
Sum of proper divisors (its aliquot sum) s(n): 21544346
21751990 is a deficient number, because the sum of its proper divisors (21544346) is less than itself. Its deficiency is 207644

Bases of 21751990

Binary: 1010010111110100010110110₂
Hexadecimal: 0x14BE8B6
Base-36: CY7XY

Squares and roots of 21751990

21751990 squared (21751990²) is 473149068960100
21751990 cubed (21751990³) is 10291933816529405599000
The square root of 21751990 is 4663.9028720589
The cube root of 21751990 is 279.1470215131

Scales and comparisons

How big is 21751990?

21,751,990 seconds is equal to 35 weeks, 6 days, 18 hours, 13 minutes, 10 seconds.
To count from 1 to 21,751,990 would take you about six days!

This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)
A cube with a volume of 21751990 cubic inches would be around 23.3 feet tall.

Recreational maths with 21751990

21751990 backwards is 09915712
The number of decimal digits it has is: 8
The sum of 21751990's digits is 34
More coming soon!

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The information we have on file for 21751990 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

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