21249891

21,249,891 is an odd composite number composed of three prime numbers multiplied together.

What does the number 21249891 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 24 divisors.

21249891 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twenty-four divisors.

Prime factorization of 21249891:

3³ × 13² × 4657

(3 × 3 × 3 × 13 × 13 × 4657)

See below for interesting mathematical facts about the number 21249891 from the Numbermatics database.

Names of 21249891

Cardinal: 21249891 can be written as Twenty-one million, two hundred forty-nine thousand, eight hundred ninety-one.

Scientific notation

Scientific notation: 2.1249891 × 10⁷

Factors of 21249891

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 6
Sum of prime factors: 4673

Divisors of 21249891

Number of divisors d(n): 24
Complete list of divisors:
1 3 9 13 27 39 117 169 351 507 1521 4563 4657 13971 41913 60541 125739 181623 544869 787033 1634607 2361099 7083297 21249891
Sum of all divisors σ(n): 34096560
Sum of proper divisors (its aliquot sum) s(n): 12846669
21249891 is a deficient number, because the sum of its proper divisors (12846669) is less than itself. Its deficiency is 8403222

Bases of 21249891

Binary: 1010001000011111101100011₂
Hexadecimal: 0x1443F63
Base-36: CNGIR

Squares and roots of 21249891

21249891 squared (21249891²) is 451557867511881
21249891 cubed (21249891³) is 9595555464819912454971
The square root of 21249891 is 4609.7604059213
The cube root of 21249891 is 276.9824392505

Scales and comparisons

How big is 21249891?

21,249,891 seconds is equal to 35 weeks, 22 hours, 44 minutes, 51 seconds.
To count from 1 to 21,249,891 would take you about four 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 21249891 cubic inches would be around 23.1 feet tall.

Recreational maths with 21249891

21249891 backwards is 19894212
The number of decimal digits it has is: 8
The sum of 21249891's digits is 36
More coming soon!

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The information we have on file for 21249891 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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