2191

Names of 2191

• Cardinal: 2191 can be written as Two thousand, one hundred ninety-one.

Scientific notation

• Scientific notation: 2.191 × 10³

Factors of 2191

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 320

Divisors of 2191

• Number of divisors d(n): 4
• Complete list of divisors:
  1 7 313 2191
• Sum of all divisors σ(n): 2512
• Sum of proper divisors (its aliquot sum) s(n): 321
• 2191 is a deficient number, because the sum of its proper divisors (321) is less than itself. Its deficiency is 1870

Bases of 2191

• Binary: 100010001111₂
• Hexadecimal: 0x88F
• Base-36: 1OV

Squares and roots of 2191

• 2191 squared (2191²) is 4800481
• 2191 cubed (2191³) is 10517853871
• The square root of 2191 is 46.8081189539
• The cube root of 2191 is 12.9881548909

Scales and comparisons

• 2,191 seconds is equal to 36 minutes, 31 seconds.
• To count from 1 to 2,191 would take you about thirty-six minutes.

  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 2191 cubic inches would be around 1.1 feet tall.

Recreational maths with 2191

• 2191 backwards is 1912
• The number of decimal digits it has is: 4
• The sum of 2191's digits is 13
• More coming soon!