216311164 has 24 divisors (see below), whose sum is σ = 387343040. Its totient is φ = 105670656.

The previous prime is 216311153. The next prime is 216311167. The reversal of 216311164 is 461113612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216311167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27124 + ... + 34180.

Almost surely, 2^216311164 is an apocalyptic number.

It is an amenable number.

216311164 is a deficient number, since it is larger than the sum of its proper divisors (171031876).

216311164 is a wasteful number, since it uses less digits than its factorization.

216311164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7237 (or 7235 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 216311164 is about 14707.5206612128. The cubic root of 216311164 is about 600.2879765752.

Adding to 216311164 its reverse (461113612), we get a palindrome (677424776).

The spelling of 216311164 in words is "two hundred sixteen million, three hundred eleven thousand, one hundred sixty-four".