15855

15,855 is an odd composite number composed of four prime numbers multiplied together.

What does the number 15855 look like?

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

15855 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 15855:

3 × 5 × 7 × 151

See below for interesting mathematical facts about the number 15855 from the Numbermatics database.

Names of 15855

Cardinal: 15855 can be written as Fifteen thousand, eight hundred fifty-five.

Scientific notation

Scientific notation: 1.5855 × 10⁴

Factors of 15855

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 4
Sum of prime factors: 166

Divisors of 15855

Number of divisors d(n): 16
Complete list of divisors:
1 3 5 7 15 21 35 105 151 453 755 1057 2265 3171 5285 15855
Sum of all divisors σ(n): 29184
Sum of proper divisors (its aliquot sum) s(n): 13329
15855 is a deficient number, because the sum of its proper divisors (13329) is less than itself. Its deficiency is 2526

Bases of 15855

Binary: 11110111101111₂
Hexadecimal: 0x3DEF
Base-36: C8F

Squares and roots of 15855

15855 squared (15855²) is 251381025
15855 cubed (15855³) is 3985646151375
The square root of 15855 is 125.9166390911
The cube root of 15855 is 25.1220696567

Scales and comparisons

How big is 15855?

15,855 seconds is equal to 4 hours, 24 minutes, 15 seconds.
To count from 1 to 15,855 would take you about four 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 15855 cubic inches would be around 2.1 feet tall.

Recreational maths with 15855

15855 backwards is 55851
The number of decimal digits it has is: 5
The sum of 15855's digits is 24
More coming soon!

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The information we have on file for 15855 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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