21442505

Names of 21442505

• Cardinal: 21442505 can be written as Twenty-one million, four hundred forty-two thousand, five hundred five.

Scientific notation

• Scientific notation: 2.1442505 × 10⁷

Factors of 21442505

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 612655

Divisors of 21442505

• Number of divisors d(n): 8
• Complete list of divisors:
  1 5 7 35 612643 3063215 4288501 21442505
• Sum of all divisors σ(n): 29406912
• Sum of proper divisors (its aliquot sum) s(n): 7964407
• 21442505 is a deficient number, because the sum of its proper divisors (7964407) is less than itself. Its deficiency is 13478098

Bases of 21442505

• Binary: 1010001110010111111001001₂
• Hexadecimal: 0x1472FC9
• Base-36: CRL55

Squares and roots of 21442505

• 21442505 squared (21442505²) is 459781020675025
• 21442505 cubed (21442505³) is 9858856834729326937625
• The square root of 21442505 is 4630.6052520161
• The cube root of 21442505 is 277.8168013027

Scales and comparisons

• 21,442,505 seconds is equal to 35 weeks, 3 days, 4 hours, 15 minutes, 5 seconds.
• To count from 1 to 21,442,505 would take you about six 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 21442505 cubic inches would be around 23.2 feet tall.

Recreational maths with 21442505

• 21442505 backwards is 50524412
• The number of decimal digits it has is: 8
• The sum of 21442505's digits is 23
• More coming soon!