216642632 has 32 divisors (see below), whose sum is σ = 420337920. Its totient is φ = 104569920.

The previous prime is 216642607. The next prime is 216642661. The reversal of 216642632 is 236246612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134858 + ... + 136454.

It is an arithmetic number, because the mean of its divisors is an integer number (13135560).

Almost surely, 2^216642632 is an apocalyptic number.

It is an amenable number.

216642632 is a deficient number, since it is larger than the sum of its proper divisors (203695288).

216642632 is a wasteful number, since it uses less digits than its factorization.

216642632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181 (or 2177 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

The square root of 216642632 is about 14718.7850042047. The cubic root of 216642632 is about 600.5944405026.

The spelling of 216642632 in words is "two hundred sixteen million, six hundred forty-two thousand, six hundred thirty-two".