204216456 has 32 divisors (see below), whose sum is σ = 511460640. Its totient is φ = 67949568.

The previous prime is 204216443. The next prime is 204216497. The reversal of 204216456 is 654612402.

204216456 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6475 + ... + 21221.

It is an arithmetic number, because the mean of its divisors is an integer number (15983145).

Almost surely, 2^204216456 is an apocalyptic number.

It is an amenable number.

204216456 is an abundant number, since it is smaller than the sum of its proper divisors (307244184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204216456 is a wasteful number, since it uses less digits than its factorization.

204216456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15333 (or 15329 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 204216456 is about 14290.4323237612. The cubic root of 204216456 is about 588.8846649012.

Adding to 204216456 its reverse (654612402), we get a palindrome (858828858).

The spelling of 204216456 in words is "two hundred four million, two hundred sixteen thousand, four hundred fifty-six".