| Base | Representation |
|---|---|
| bin | 11011100011111… |
| … | …10111000000000 |
| 3 | 121010001111120000 |
| 4 | 31301332320000 |
| 5 | 433142101100 |
| 6 | 34535320000 |
| 7 | 5505136065 |
| oct | 1561767000 |
| 9 | 533044500 |
| 10 | 231206400 |
| 11 | 109567877 |
| 12 | 65520000 |
| 13 | 38b92429 |
| 14 | 229c6c6c |
| 15 | 15470900 |
| hex | dc7ee00 |
231206400 has 300 divisors, whose sum is σ = 859549152. Its totient is φ = 61378560.
The previous prime is 231206389. The next prime is 231206407. The reversal of 231206400 is 4602132.
It is a happy number.
231206400 is a `hidden beast` number, since 2 + 3 + 1 + 20 + 640 + 0 = 666.
231206400 is digitally balanced in base 2, 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 (300).
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a nialpdrome in base 12.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (231206407) by changing a digit.
It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1036689 + ... + 1036911.
Almost surely, 2231206400 is an apocalyptic number.
231206400 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 231206400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (429774576).
231206400 is an abundant number, since it is smaller than the sum of its proper divisors (628342752).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
231206400 is an equidigital number, since it uses as much as digits as its factorization.
231206400 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 263 (or 233 counting only the distinct ones).
The product of its (nonzero) digits is 288, while the sum is 18.
The square root of 231206400 is about 15205.4726989989. The cubic root of 231206400 is about 613.7619352446.
Adding to 231206400 its reverse (4602132), we get a palindrome (235808532).
The spelling of 231206400 in words is "two hundred thirty-one million, two hundred six thousand, four hundred".
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