218513820

Names of 218513820

• Cardinal: 218513820 can be written as Two hundred eighteen million, five hundred thirteen thousand, eight hundred twenty.

Scientific notation

• Scientific notation: 2.1851382 × 10⁸

Factors of 218513820

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 7217

Divisors of 218513820

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 5 6 7 10 12 14 15 20 21 28 30 35 42 60 70 73 84 105 140 146 210 219 292 365 420 438 511 730 876 1022 1095 1460 1533 2044 2190 2555 3066 4380 5110 6132 7127 7665 10220 14254 15330 21381 28508 30660 35635 42762 49889 71270 85524 99778 106905 142540 149667 199556 213810 249445 299334 427620 498890 520271 598668 748335 997780 1040542 1496670 1560813 2081084 2601355 2993340 3121626 3641897 5202710 6243252 7283794 7804065 10405420 10925691 14567588 15608130 18209485 21851382 31216260 36418970 43702764 54628455 72837940 109256910 218513820
• Sum of all divisors σ(n): 708922368
• Sum of proper divisors (its aliquot sum) s(n): 490408548
• 218513820 is an abundant number, because the sum of its proper divisors (490408548) is greater than itself. Its abundance is 271894728

Bases of 218513820

• Binary: 1101000001100100000110011100₂
• Hexadecimal: 0xD06419C
• Base-36: 3M3ICC

Squares and roots of 218513820

• 218513820 squared (218513820²) is 47748289530992400
• 218513820 cubed (218513820³) is 10433661143883157714968000
• The square root of 218513820 is 14782.2129601761
• The cube root of 218513820 is 602.3186394213

Scales and comparisons

• 218,513,820 seconds is equal to 6 years, 49 weeks, 2 days, 2 hours, 17 minutes.
• To count from 1 to 218,513,820 would take you about ten years!

  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 218513820 cubic inches would be around 50.2 feet tall.

Recreational maths with 218513820

• 218513820 backwards is 028315812
• 218513820 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 218513820's digits is 30
• More coming soon!