131

Names of 131

• Cardinal: 131 can be written as One hundred thirty-one.

Scientific notation

• Scientific notation: 1.31 × 10²

Factors of 131

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 131

Divisors of 131

• Number of divisors d(n): 2
• Complete list of divisors:
  1 131
• Sum of all divisors σ(n): 132
• Sum of proper divisors (its aliquot sum) s(n): 1
• 131 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 130

Bases of 131

• Binary: 10000011₂
• Hexadecimal: 0x83
• Base-36: 3N

Squares and roots of 131

• 131 squared (131²) is 17161
• 131 cubed (131³) is 2248091
• The square root of 131 is 11.4455231423
• The cube root of 131 is 5.0787530781

Scales and comparisons

• 131 seconds is equal to 2 minutes, 11 seconds.
• To count from 1 to 131 would take you about five seconds.

  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 131 cubic inches would be around 0.4 feet tall.

Recreational maths with 131

• 131 is the same when its digits are reversed! That makes it a palindromic prime number.
• The number of decimal digits it has is: 3
• The sum of 131's digits is 5
• More coming soon!