13218232 has 8 divisors (see below), whose sum is σ = 24784200. Its totient is φ = 6609112.

The previous prime is 13218209. The next prime is 13218263. The reversal of 13218232 is 23281231.

13218232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

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, 826132 + ... + 826147.

It is an arithmetic number, because the mean of its divisors is an integer number (3098025).

Almost surely, 2^13218232 is an apocalyptic number.

It is an amenable number.

13218232 is a deficient number, since it is larger than the sum of its proper divisors (11565968).

13218232 is a wasteful number, since it uses less digits than its factorization.

13218232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652285 (or 1652281 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 13218232 is about 3635.6886555369. The cubic root of 13218232 is about 236.4419087731.

Adding to 13218232 its reverse (23281231), we get a palindrome (36499463).

The spelling of 13218232 in words is "thirteen million, two hundred eighteen thousand, two hundred thirty-two".