216104304 has 40 divisors (see below), whose sum is σ = 601214992. Its totient is φ = 66493440.

The previous prime is 216104299. The next prime is 216104311. The reversal of 216104304 is 403401612.

It is a congruent number.

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, 172537 + ... + 173784.

Almost surely, 2^216104304 is an apocalyptic number.

216104304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

216104304 is an abundant number, since it is smaller than the sum of its proper divisors (385110688).

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

216104304 is a wasteful number, since it uses less digits than its factorization.

216104304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346345 (or 346339 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 216104304 is about 14700.4865225611. The cubic root of 216104304 is about 600.0965622365.

Adding to 216104304 its reverse (403401612), we get a palindrome (619505916).

The spelling of 216104304 in words is "two hundred sixteen million, one hundred four thousand, three hundred four".