81801

81,801 is an odd composite number composed of three prime numbers multiplied together.

What does the number 81801 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 12 divisors.

81801 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twelve divisors.

Prime factorization of 81801:

3² × 61 × 149

(3 × 3 × 61 × 149)

See below for interesting mathematical facts about the number 81801 from the Numbermatics database.

Names of 81801

Cardinal: 81801 can be written as Eighty-one thousand, eight hundred one.

Scientific notation

Scientific notation: 8.1801 × 10⁴

Factors of 81801

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 4
Sum of prime factors: 213

Divisors of 81801

Number of divisors d(n): 12
Complete list of divisors:
1 3 9 61 149 183 447 549 1341 9089 27267 81801
Sum of all divisors σ(n): 120900
Sum of proper divisors (its aliquot sum) s(n): 39099
81801 is a deficient number, because the sum of its proper divisors (39099) is less than itself. Its deficiency is 42702

Bases of 81801

Binary: 10011111110001001₂
Hexadecimal: 0x13F89
Base-36: 1R49

Squares and roots of 81801

81801 squared (81801²) is 6691403601
81801 cubed (81801³) is 547363505965401
The square root of 81801 is 286.0087411251
The cube root of 81801 is 43.4096420067

Scales and comparisons

How big is 81801?

81,801 seconds is equal to 22 hours, 43 minutes, 21 seconds.
To count from 1 to 81,801 would take you about twenty-two 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 81801 cubic inches would be around 3.6 feet tall.

Recreational maths with 81801

81801 backwards is 10818
The number of decimal digits it has is: 5
The sum of 81801's digits is 18
More coming soon!

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The information we have on file for 81801 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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