216656632 has 16 divisors (see below), whose sum is σ = 406427400. Its totient is φ = 108276000.

The previous prime is 216656623. The next prime is 216656647. The reversal of 216656632 is 236656612.

It is a junction number, because it is equal to n+sod(n) for n = 216656591 and 216656600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15382 + ... + 25882.

Almost surely, 2^216656632 is an apocalyptic number.

It is an amenable number.

216656632 is a deficient number, since it is larger than the sum of its proper divisors (189770768).

216656632 is a wasteful number, since it uses less digits than its factorization.

216656632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13086 (or 13082 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 216656632 is about 14719.2605792547. The cubic root of 216656632 is about 600.6073775393.

The spelling of 216656632 in words is "two hundred sixteen million, six hundred fifty-six thousand, six hundred thirty-two".