13581

13,581 is an odd composite number composed of two prime numbers multiplied together.

What does the number 13581 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 8 divisors.

13581 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of eight divisors.

Prime factorization of 13581:

3³ × 503

(3 × 3 × 3 × 503)

See below for interesting mathematical facts about the number 13581 from the Numbermatics database.

Names of 13581

Cardinal: 13581 can be written as Thirteen thousand, five hundred eighty-one.

Scientific notation

Scientific notation: 1.3581 × 10⁴

Factors of 13581

Number of distinct prime factors ω(n): 2
Total number of prime factors Ω(n): 4
Sum of prime factors: 506

Divisors of 13581

Number of divisors d(n): 8
Complete list of divisors:
1 3 9 27 503 1509 4527 13581
Sum of all divisors σ(n): 20160
Sum of proper divisors (its aliquot sum) s(n): 6579
13581 is a deficient number, because the sum of its proper divisors (6579) is less than itself. Its deficiency is 7002

Bases of 13581

Binary: 11010100001101₂
Hexadecimal: 0x350D
Base-36: AH9

Squares and roots of 13581

13581 squared (13581²) is 184443561
13581 cubed (13581³) is 2504928001941
The square root of 13581 is 116.5375475973
The cube root of 13581 is 23.8585428833

Scales and comparisons

How big is 13581?

13,581 seconds is equal to 3 hours, 46 minutes, 21 seconds.
To count from 1 to 13,581 would take you about three hours.

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 13581 cubic inches would be around 2 feet tall.

Recreational maths with 13581

13581 backwards is 18531
The number of decimal digits it has is: 5
The sum of 13581's digits is 18
More coming soon!

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The information we have on file for 13581 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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