13018216 has 16 divisors (see below), whose sum is σ = 25251300. Its totient is φ = 6284544.

The previous prime is 13018199. The next prime is 13018217. The reversal of 13018216 is 61281031.

It can be written as a sum of positive squares in 2 ways, for example, as 11249316 + 1768900 = 3354^2 + 1330^2 .

It is not an unprimeable number, because it can be changed into a prime (13018217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27825 + ... + 28288.

Almost surely, 2^13018216 is an apocalyptic number.

It is an amenable number.

13018216 is a deficient number, since it is larger than the sum of its proper divisors (12233084).

13018216 is a wasteful number, since it uses less digits than its factorization.

13018216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56148 (or 56144 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 13018216 is about 3608.0764958631. The cubic root of 13018216 is about 235.2432429322.

Adding to 13018216 its reverse (61281031), we get a palindrome (74299247).

The spelling of 13018216 in words is "thirteen million, eighteen thousand, two hundred sixteen".