216659164 has 12 divisors (see below), whose sum is σ = 382697784. Its totient is φ = 107316944.

The previous prime is 216659141. The next prime is 216659167. The reversal of 216659164 is 461956612.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216659167) by changing a digit.

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, 252679 + ... + 253534.

It is an arithmetic number, because the mean of its divisors is an integer number (31891482).

Almost surely, 2^216659164 is an apocalyptic number.

It is an amenable number.

216659164 is a deficient number, since it is larger than the sum of its proper divisors (166038620).

216659164 is a wasteful number, since it uses less digits than its factorization.

216659164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506324 (or 506322 counting only the distinct ones).

The product of its digits is 77760, while the sum is 40.

The square root of 216659164 is about 14719.3465887586. The cubic root of 216659164 is about 600.6097172353.

The spelling of 216659164 in words is "two hundred sixteen million, six hundred fifty-nine thousand, one hundred sixty-four".