216304516 has 12 divisors (see below), whose sum is σ = 388763788. Its totient is φ = 105229152.

The previous prime is 216304483. The next prime is 216304537. The reversal of 216304516 is 615403612.

It can be written as a sum of positive squares in 2 ways, for example, as 163072900 + 53231616 = 12770^2 + 7296^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 730611 + ... + 730906.

Almost surely, 2^216304516 is an apocalyptic number.

It is an amenable number.

216304516 is a deficient number, since it is larger than the sum of its proper divisors (172459272).

216304516 is a wasteful number, since it uses less digits than its factorization.

216304516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461558 (or 1461556 counting only the distinct ones).

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

The square root of 216304516 is about 14707.2946526545. The cubic root of 216304516 is about 600.2818268612.

The spelling of 216304516 in words is "two hundred sixteen million, three hundred four thousand, five hundred sixteen".