216311132 has 6 divisors (see below), whose sum is σ = 378544488. Its totient is φ = 108155564.

The previous prime is 216311107. The next prime is 216311153. The reversal of 216311132 is 231113612.

216311132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27038888 + ... + 27038895.

It is an arithmetic number, because the mean of its divisors is an integer number (63090748).

Almost surely, 2^216311132 is an apocalyptic number.

It is an amenable number.

216311132 is a deficient number, since it is larger than the sum of its proper divisors (162233356).

216311132 is a wasteful number, since it uses less digits than its factorization.

216311132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54077787 (or 54077785 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

The square root of 216311132 is about 14707.5195733339. The cubic root of 216311132 is about 600.2879469740.

Adding to 216311132 its reverse (231113612), we get a palindrome (447424744).

The spelling of 216311132 in words is "two hundred sixteen million, three hundred eleven thousand, one hundred thirty-two".