821397831921
821,397,831,921 is an odd composite number composed of two prime numbers multiplied together.
What does the number 821397831921 look like?
This visualization shows the relationship between its 2 prime factors (large circles) and 8 divisors.
821397831921 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of eight divisors.
Prime factorization of 821397831921:
33 × 30422141923
(3 × 3 × 3 × 30422141923)See below for interesting mathematical facts about the number 821397831921 from the Numbermatics database.
Names of 821397831921
- Cardinal: 821397831921 can be written as Eight hundred twenty-one billion, three hundred ninety-seven million, eight hundred thirty-one thousand, nine hundred twenty-one.
Scientific notation
- Scientific notation: 8.21397831921 × 1011
Factors of 821397831921
- Number of distinct prime factors ω(n): 2
- Total number of prime factors Ω(n): 4
- Sum of prime factors: 30422141926
Divisors of 821397831921
- Number of divisors d(n): 8
- Complete list of divisors:
- Sum of all divisors σ(n): 1216885676960
- Sum of proper divisors (its aliquot sum) s(n): 395487845039
- 821397831921 is a deficient number, because the sum of its proper divisors (395487845039) is less than itself. Its deficiency is 425909986882
Bases of 821397831921
- Binary: 10111111001111110010000001000000111100012
- Hexadecimal: 0xBF3F2040F1
- Base-36: AHCF27E9
Squares and roots of 821397831921
- 821397831921 squared (8213978319212) is 674694398284519366550241
- 821397831921 cubed (8213978319213) is 554192515960147869381904246520042961
-
The
square root of 821397831921 is 906310.0087282497 -
The
cube root of 821397831921 is 9365.2171279771
Scales and comparisons
How big is 821397831921?- 821,397,831,921 seconds is equal to 26,117 years, 47 weeks, 2 days, 8 hours, 25 minutes, 21 seconds.
-
To count from 1 to 821,397,831,921 would take you about fifty-two thousand, two hundred thirty-five 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 821397831921 cubic inches would be around 780.4 feet tall.
Recreational maths with 821397831921
- 821397831921 backwards is 129138793128
- The number of decimal digits it has is: 12
- The sum of 821397831921's digits is 54
- More coming soon!
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