157

Names of 157

• Cardinal: 157 can be written as One hundred fifty-seven.

Scientific notation

• Scientific notation: 1.57 × 10²

Factors of 157

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 157

Divisors of 157

• Number of divisors d(n): 2
• Complete list of divisors:
  1 157
• Sum of all divisors σ(n): 158
• Sum of proper divisors (its aliquot sum) s(n): 1
• 157 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 156

Bases of 157

• Binary: 10011101₂
• Hexadecimal: 0x9D
• Base-36: 4D

Squares and roots of 157

• 157 squared (157²) is 24649
• 157 cubed (157³) is 3869893
• The square root of 157 is 12.5299640861
• The cube root of 157 is 5.3946907121

Scales and comparisons

• 157 seconds is equal to 2 minutes, 37 seconds.
• To count from 1 to 157 would take you about eighteen 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 157 cubic inches would be around 0.4 feet tall.

Recreational maths with 157

• 157 backwards is 751
• The number of decimal digits it has is: 3
• The sum of 157's digits is 13
• More coming soon!