216516304 has 40 divisors (see below), whose sum is σ = 432297728. Its totient is φ = 104976000.

The previous prime is 216516299. The next prime is 216516317. The reversal of 216516304 is 403615612.

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, 287929 + ... + 288679.

Almost surely, 2^216516304 is an apocalyptic number.

It is an amenable number.

216516304 is a deficient number, since it is larger than the sum of its proper divisors (215781424).

216516304 is a wasteful number, since it uses less digits than its factorization.

216516304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283 (or 1277 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 216516304 is about 14714.4929916052. The cubic root of 216516304 is about 600.4776788632.

The spelling of 216516304 in words is "two hundred sixteen million, five hundred sixteen thousand, three hundred four".