216732806 has 32 divisors (see below), whose sum is σ = 342171648. Its totient is φ = 102864960.

The previous prime is 216732797. The next prime is 216732809. The reversal of 216732806 is 608237612.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216732809) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 565691 + ... + 566073.

It is an arithmetic number, because the mean of its divisors is an integer number (10692864).

Almost surely, 2^216732806 is an apocalyptic number.

216732806 is a deficient number, since it is larger than the sum of its proper divisors (125438842).

216732806 is a wasteful number, since it uses less digits than its factorization.

216732806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 216732806 is about 14721.8479138999. The cubic root of 216732806 is about 600.6777581922.

The spelling of 216732806 in words is "two hundred sixteen million, seven hundred thirty-two thousand, eight hundred six".