21315870

21,315,870 is an even composite number composed of five prime numbers multiplied together.

What does the number 21315870 look like?

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

21315870 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 21315870:

2 × 3² × 5 × 29 × 8167

(2 × 3 × 3 × 5 × 29 × 8167)

See below for interesting mathematical facts about the number 21315870 from the Numbermatics database.

Names of 21315870

Cardinal: 21315870 can be written as Twenty-one million, three hundred fifteen thousand, eight hundred seventy.

Scientific notation

Scientific notation: 2.131587 × 10⁷

Factors of 21315870

Number of distinct prime factors ω(n): 5
Total number of prime factors Ω(n): 6
Sum of prime factors: 8206

Divisors of 21315870

Number of divisors d(n): 48
Complete list of divisors:
1 2 3 5 6 9 10 15 18 29 30 45 58 87 90 145 174 261 290 435 522 870 1305 2610 8167 16334 24501 40835 49002 73503 81670 122505 147006 236843 245010 367515 473686 710529 735030 1184215 1421058 2131587 2368430 3552645 4263174 7105290 10657935 21315870
Sum of all divisors σ(n): 57339360
Sum of proper divisors (its aliquot sum) s(n): 36023490
21315870 is an abundant number, because the sum of its proper divisors (36023490) is greater than itself. Its abundance is 14707620

Bases of 21315870

Binary: 1010001010100000100011110₂
Hexadecimal: 0x145411E
Base-36: COVFI

Squares and roots of 21315870

21315870 squared (21315870²) is 454366313856900
21315870 cubed (21315870³) is 9685213278552879003000
The square root of 21315870 is 4616.9113051909
The cube root of 21315870 is 277.2688115871

Scales and comparisons

How big is 21315870?

21,315,870 seconds is equal to 35 weeks, 1 day, 17 hours, 4 minutes, 30 seconds.
To count from 1 to 21,315,870 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 21315870 cubic inches would be around 23.1 feet tall.

Recreational maths with 21315870

21315870 backwards is 07851312
The number of decimal digits it has is: 8
The sum of 21315870's digits is 27
More coming soon!

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The information we have on file for 21315870 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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