155131998

Names of 155131998

• Cardinal: 155131998 can be written as One hundred fifty-five million, one hundred thirty-one thousand, nine hundred ninety-eight.

Scientific notation

• Scientific notation: 1.55131998 × 10⁸

Factors of 155131998

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 6333

Divisors of 155131998

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 6 7 14 19 21 31 38 42 57 62 93 114 133 186 217 266 399 434 589 651 798 1178 1302 1767 3534 4123 6271 8246 12369 12542 18813 24738 37626 43897 87794 119149 131691 194401 238298 263382 357447 388802 583203 714894 834043 1166406 1360807 1668086 2502129 2721614 3693619 4082421 5004258 7387238 8164842 11080857 22161714 25855333 51710666 77565999 155131998
• Sum of all divisors σ(n): 385351680
• Sum of proper divisors (its aliquot sum) s(n): 230219682
• 155131998 is an abundant number, because the sum of its proper divisors (230219682) is greater than itself. Its abundance is 75087684

Bases of 155131998

• Binary: 1001001111110010000001011110₂
• Hexadecimal: 0x93F205E
• Base-36: 2KD0M6

Squares and roots of 155131998

• 155131998 squared (155131998²) is 24065936803472004
• 155131998 cubed (155131998³) is 3733396860064345317583992
• The square root of 155131998 is 12455.1996370993
• The cube root of 155131998 is 537.3209764713

Scales and comparisons

• 155,131,998 seconds is equal to 4 years, 48 weeks, 3 days, 12 hours, 13 minutes, 18 seconds.
• To count from 1 to 155,131,998 would take you about seven 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 155131998 cubic inches would be around 44.8 feet tall.

Recreational maths with 155131998

• 155131998 backwards is 899131551
• 155131998 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 155131998's digits is 42
• More coming soon!