21491875

21,491,875 is an odd composite number composed of three prime numbers multiplied together.

What does the number 21491875 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 20 divisors.

21491875 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twenty divisors.

Prime factorization of 21491875:

5⁴ × 137 × 251

(5 × 5 × 5 × 5 × 137 × 251)

See below for interesting mathematical facts about the number 21491875 from the Numbermatics database.

Names of 21491875

Cardinal: 21491875 can be written as Twenty-one million, four hundred ninety-one thousand, eight hundred seventy-five.

Scientific notation

Scientific notation: 2.1491875 × 10⁷

Factors of 21491875

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 6
Sum of prime factors: 393

Divisors of 21491875

Number of divisors d(n): 20
Complete list of divisors:
1 5 25 125 137 251 625 685 1255 3425 6275 17125 31375 34387 85625 156875 171935 859675 4298375 21491875
Sum of all divisors σ(n): 27160056
Sum of proper divisors (its aliquot sum) s(n): 5668181
21491875 is a deficient number, because the sum of its proper divisors (5668181) is less than itself. Its deficiency is 15823694

Bases of 21491875

Binary: 1010001111111000010100011₂
Hexadecimal: 0x147F0A3
Base-36: CSN8J

Squares and roots of 21491875

21491875 squared (21491875²) is 461900691015625
21491875 cubed (21491875³) is 9927111913721435546875
The square root of 21491875 is 4635.9330236749
The cube root of 21491875 is 278.0298563589

Scales and comparisons

How big is 21491875?

21,491,875 seconds is equal to 35 weeks, 3 days, 17 hours, 57 minutes, 55 seconds.
To count from 1 to 21,491,875 would take you about two 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 21491875 cubic inches would be around 23.2 feet tall.

Recreational maths with 21491875

21491875 backwards is 57819412
The number of decimal digits it has is: 8
The sum of 21491875's digits is 37
More coming soon!

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The information we have on file for 21491875 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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