51

51 is an odd composite number composed of two prime numbers multiplied together.

What does the number 51 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

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

Prime factorization of 51:

3 × 17

See below for interesting mathematical facts about the number 51 from the Numbermatics database.

Names of 51

Cardinal: 51 can be written as Fifty-one.

Scientific notation

Scientific notation: 5.1 × 10¹

Factors of 51

Number of distinct prime factors ω(n): 2
Total number of prime factors Ω(n): 2
Sum of prime factors: 20

Divisors of 51

Number of divisors d(n): 4
Complete list of divisors:
1 3 17 51
Sum of all divisors σ(n): 72
Sum of proper divisors (its aliquot sum) s(n): 21
51 is a deficient number, because the sum of its proper divisors (21) is less than itself. Its deficiency is 30

Bases of 51

Binary: 110011₂
Hexadecimal: 0x33
Base-36: 1F

Squares and roots of 51

51 squared (51²) is 2601
51 cubed (51³) is 132651
The square root of 51 is 7.1414284285
The cube root of 51 is 3.7084297693

Scales and comparisons

How big is 51?

A cube with a volume of 51 cubic inches would be around 0.3 feet tall.

Recreational maths with 51

51 backwards is 15
The number of decimal digits it has is: 2
The sum of 51's digits is 6
More coming soon!

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The information we have on file for 51 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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