| Base | Representation |
|---|---|
| bin | 1100010010110110011… |
| … | …1001000101011100000 |
| 3 | 202012012012010012121210 |
| 4 | 3010231213020223200 |
| 5 | 11430033432201032 |
| 6 | 241011004150120 |
| 7 | 21155123513106 |
| oct | 3045547105340 |
| 9 | 665165105553 |
| 10 | 211218631392 |
| 11 | 81639457a9a |
| 12 | 34b28838340 |
| 13 | 16bc16252c2 |
| 14 | a31a023c76 |
| 15 | 57632ed2cc |
| hex | 312d9c8ae0 |
211218631392 has 96 divisors (see below), whose sum is σ = 588261429504. Its totient is φ = 66129459200.
The previous prime is 211218631391. The next prime is 211218631397. The reversal of 211218631392 is 293136812112.
211218631392 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a tau number, because it is divible by the number of its divisors (96).
It is a super-2 number, since 2×2112186313922 (a number of 23 digits) contains 22 as substring.
It is a self number, because there is not a number n which added to its sum of digits gives 211218631392.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (211218631391) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 669517 + ... + 933107.
It is an arithmetic number, because the mean of its divisors is an integer number (6127723224).
Almost surely, 2211218631392 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 211218631392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294130714752).
211218631392 is an abundant number, since it is smaller than the sum of its proper divisors (377042798112).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
211218631392 is a wasteful number, since it uses less digits than its factorization.
211218631392 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 264112 (or 264104 counting only the distinct ones).
The product of its digits is 31104, while the sum is 39.
The spelling of 211218631392 in words is "two hundred eleven billion, two hundred eighteen million, six hundred thirty-one thousand, three hundred ninety-two".
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