21871213

21,871,213 is an odd composite number composed of four prime numbers multiplied together.

What does the number 21871213 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 16 divisors.

21871213 is an odd composite number. It is composed of four distinct prime numbers multiplied together. It has a total of sixteen divisors.

Prime factorization of 21871213:

7 × 13 × 31 × 7753

See below for interesting mathematical facts about the number 21871213 from the Numbermatics database.

Names of 21871213

Cardinal: 21871213 can be written as Twenty-one million, eight hundred seventy-one thousand, two hundred thirteen.

Scientific notation

Scientific notation: 2.1871213 × 10⁷

Factors of 21871213

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 4
Sum of prime factors: 7804

Divisors of 21871213

Number of divisors d(n): 16
Complete list of divisors:
1 7 13 31 91 217 403 2821 7753 54271 100789 240343 705523 1682401 3124459 21871213
Sum of all divisors σ(n): 27790336
Sum of proper divisors (its aliquot sum) s(n): 5919123
21871213 is a deficient number, because the sum of its proper divisors (5919123) is less than itself. Its deficiency is 15952090

Bases of 21871213

Binary: 1010011011011101001101101₂
Hexadecimal: 0x14DBA6D
Base-36: D0RXP

Squares and roots of 21871213

21871213 squared (21871213²) is 478349958091369
21871213 cubed (21871213³) is 10462093821957404860597
The square root of 21871213 is 4676.6668686149
The cube root of 21871213 is 279.6560956365

Scales and comparisons

How big is 21871213?

21,871,213 seconds is equal to 36 weeks, 1 day, 3 hours, 20 minutes, 13 seconds.
To count from 1 to 21,871,213 would take you about two weeks!

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 21871213 cubic inches would be around 23.3 feet tall.

Recreational maths with 21871213

21871213 backwards is 31217812
The number of decimal digits it has is: 8
The sum of 21871213's digits is 25
More coming soon!

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The information we have on file for 21871213 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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