13218056 has 16 divisors (see below), whose sum is σ = 24829740. Its totient is φ = 6596800.

The previous prime is 13218047. The next prime is 13218083. The reversal of 13218056 is 65081231.

It can be written as a sum of positive squares in 2 ways, for example, as 13205956 + 12100 = 3634^2 + 110^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4430 + ... + 6786.

Almost surely, 2^13218056 is an apocalyptic number.

It is an amenable number.

13218056 is a deficient number, since it is larger than the sum of its proper divisors (11611684).

13218056 is a wasteful number, since it uses less digits than its factorization.

13218056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064 (or 3060 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 13218056 is about 3635.6644509635. The cubic root of 13218056 is about 236.4408593650.

Adding to 13218056 its reverse (65081231), we get a palindrome (78299287).

The spelling of 13218056 in words is "thirteen million, two hundred eighteen thousand, fifty-six".