216566930 has 32 divisors (see below), whose sum is σ = 406218240. Its totient is φ = 83036160.

The previous prime is 216566923. The next prime is 216566941. The reversal of 216566930 is 39665612.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29906 + ... + 36434.

It is an arithmetic number, because the mean of its divisors is an integer number (12694320).

Almost surely, 2^216566930 is an apocalyptic number.

216566930 is a deficient number, since it is larger than the sum of its proper divisors (189651310).

216566930 is a wasteful number, since it uses less digits than its factorization.

216566930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6674.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 216566930 is about 14716.2131677956. The cubic root of 216566930 is about 600.5244765921.

The spelling of 216566930 in words is "two hundred sixteen million, five hundred sixty-six thousand, nine hundred thirty".