51991

Names of 51991

• Cardinal: 51991 can be written as Fifty-one thousand, nine hundred ninety-one.

Scientific notation

• Scientific notation: 5.1991 × 10⁴

Factors of 51991

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 51991

Divisors of 51991

• Number of divisors d(n): 2
• Complete list of divisors:
  1 51991
• Sum of all divisors σ(n): 51992
• Sum of proper divisors (its aliquot sum) s(n): 1
• 51991 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 51990

Bases of 51991

• Binary: 1100101100010111₂
• Hexadecimal: 0xCB17
• Base-36: 1447

Squares and roots of 51991

• 51991 squared (51991²) is 2703064081
• 51991 cubed (51991³) is 140535004635271
• The square root of 51991 is 228.0153503603
• The cube root of 51991 is 37.3229580721

Scales and comparisons

• 51,991 seconds is equal to 14 hours, 26 minutes, 31 seconds.
• To count from 1 to 51,991 would take you about fourteen 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 51991 cubic inches would be around 3.1 feet tall.

Recreational maths with 51991

• 51991 backwards is 19915
• The number of decimal digits it has is: 5
• The sum of 51991's digits is 25
• More coming soon!