218764132 has 24 divisors (see below), whose sum is σ = 407990016. Its totient is φ = 102398208.

The previous prime is 218764123. The next prime is 218764159. The reversal of 218764132 is 231467812.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20973 + ... + 29620.

It is an arithmetic number, because the mean of its divisors is an integer number (16999584).

Almost surely, 2^218764132 is an apocalyptic number.

It is an amenable number.

218764132 is a deficient number, since it is larger than the sum of its proper divisors (189225884).

218764132 is a wasteful number, since it uses less digits than its factorization.

218764132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50667 (or 50665 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 218764132 is about 14790.6771988303. The cubic root of 218764132 is about 602.5485410522.

The spelling of 218764132 in words is "two hundred eighteen million, seven hundred sixty-four thousand, one hundred thirty-two".