21513001

Names of 21513001

• Cardinal: 21513001 can be written as Twenty-one million, five hundred thirteen thousand and one.

Scientific notation

• Scientific notation: 2.1513001 × 10⁷

Factors of 21513001

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 21513001

Divisors of 21513001

• Number of divisors d(n): 2
• Complete list of divisors:
  1 21513001
• Sum of all divisors σ(n): 21513002
• Sum of proper divisors (its aliquot sum) s(n): 1
• 21513001 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 21513000

Bases of 21513001

• Binary: 1010010000100001100101001₂
• Hexadecimal: 0x1484329
• Base-36: CT3JD

Squares and roots of 21513001

• 21513001 squared (21513001²) is 462809212026001
• 21513001 cubed (21513001³) is 9956415041124571539001
• The square root of 21513001 is 4638.2109697597
• The cube root of 21513001 is 278.1209254295

Scales and comparisons

• 21,513,001 seconds is equal to 35 weeks, 3 days, 23 hours, 50 minutes, 1 second.
• To count from 1 to 21,513,001 would take you about two 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 21513001 cubic inches would be around 23.2 feet tall.

Recreational maths with 21513001

• 21513001 backwards is 10031512
• The number of decimal digits it has is: 8
• The sum of 21513001's digits is 13
• More coming soon!