21145550

Names of 21145550

• Cardinal: 21145550 can be written as Twenty-one million, one hundred forty-five thousand, five hundred fifty.

Scientific notation

• Scientific notation: 2.114555 × 10⁷

Factors of 21145550

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 422918

Divisors of 21145550

• Number of divisors d(n): 12
• Complete list of divisors:
  1 2 5 10 25 50 422911 845822 2114555 4229110 10572775 21145550
• Sum of all divisors σ(n): 39330816
• Sum of proper divisors (its aliquot sum) s(n): 18185266
• 21145550 is a deficient number, because the sum of its proper divisors (18185266) is less than itself. Its deficiency is 2960284

Bases of 21145550

• Binary: 1010000101010011111001110₂
• Hexadecimal: 0x142A7CE
• Base-36: CL80E

Squares and roots of 21145550

• 21145550 squared (21145550²) is 447134284802500
• 21145550 cubed (21145550³) is 9454900376005503875000
• The square root of 21145550 is 4598.4290795879
• The cube root of 21145550 is 276.5283497577

Scales and comparisons

• 21,145,550 seconds is equal to 34 weeks, 6 days, 17 hours, 45 minutes, 50 seconds.
• To count from 1 to 21,145,550 would take you about three days!

  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 21145550 cubic inches would be around 23 feet tall.

Recreational maths with 21145550

• 21145550 backwards is 05554112
• The number of decimal digits it has is: 8
• The sum of 21145550's digits is 23
• More coming soon!