21022157

Names of 21022157

• Cardinal: 21022157 can be written as Twenty-one million, twenty-two thousand, one hundred fifty-seven.

Scientific notation

• Scientific notation: 2.1022157 × 10⁷

Factors of 21022157

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 19579

Divisors of 21022157

• Number of divisors d(n): 8
• Complete list of divisors:
  1 13 83 1079 19483 253279 1617089 21022157
• Sum of all divisors σ(n): 22913184
• Sum of proper divisors (its aliquot sum) s(n): 1891027
• 21022157 is a deficient number, because the sum of its proper divisors (1891027) is less than itself. Its deficiency is 19131130

Bases of 21022157

• Binary: 1010000001100010111001101₂
• Hexadecimal: 0x140C5CD
• Base-36: CIKST

Squares and roots of 21022157

• 21022157 squared (21022157²) is 441931084932649
• 21022157 cubed (21022157³) is 9290344650634481703893
• The square root of 21022157 is 4584.9925845087
• The cube root of 21022157 is 275.9894144579

Scales and comparisons

• 21,022,157 seconds is equal to 34 weeks, 5 days, 7 hours, 29 minutes, 17 seconds.
• To count from 1 to 21,022,157 would take you about twenty-three 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 21022157 cubic inches would be around 23 feet tall.

Recreational maths with 21022157

• 21022157 backwards is 75122012
• The number of decimal digits it has is: 8
• The sum of 21022157's digits is 20
• More coming soon!