| Base | Representation |
|---|---|
| bin | 1100100010001010111… |
| … | …1110011010110011000 |
| 3 | 202120210210212111111000 |
| 4 | 3020202233303112120 |
| 5 | 12011444304234430 |
| 6 | 242531041305000 |
| 7 | 21362053013400 |
| oct | 3104257632630 |
| 9 | 676723774430 |
| 10 | 215331321240 |
| 11 | 83359a0a822 |
| 12 | 35896035160 |
| 13 | 173c86b14a9 |
| 14 | a5ca30d800 |
| 15 | 59043d2e60 |
| hex | 3222bf3598 |
215331321240 has 384 divisors, whose sum is σ = 840518899200. Its totient is φ = 48890822400.
The previous prime is 215331321229. The next prime is 215331321241. The reversal of 215331321240 is 42123133512.
215331321240 is a `hidden beast` number, since 2 + 1 + 5 + 331 + 321 + 2 + 4 + 0 = 666.
215331321240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (215331321241) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7977447 + ... + 8004393.
It is an arithmetic number, because the mean of its divisors is an integer number (2188851300).
Almost surely, 2215331321240 is an apocalyptic number.
215331321240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 215331321240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (420259449600).
215331321240 is an abundant number, since it is smaller than the sum of its proper divisors (625187577960).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
215331321240 is a wasteful number, since it uses less digits than its factorization.
215331321240 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 27132 (or 27115 counting only the distinct ones).
The product of its (nonzero) digits is 4320, while the sum is 27.
Adding to 215331321240 its reverse (42123133512), we get a palindrome (257454454752).
The spelling of 215331321240 in words is "two hundred fifteen billion, three hundred thirty-one million, three hundred twenty-one thousand, two hundred forty".
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