13318216 has 16 divisors (see below), whose sum is σ = 25141500. Its totient is φ = 6613824.

The previous prime is 13318213. The next prime is 13318223. The reversal of 13318216 is 61281331.

It can be written as a sum of positive squares in 2 ways, for example, as 12602500 + 715716 = 3550^2 + 846^2 .

It is not an unprimeable number, because it can be changed into a prime (13318213) 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, 4395 + ... + 6778.

Almost surely, 2^13318216 is an apocalyptic number.

It is an amenable number.

13318216 is a deficient number, since it is larger than the sum of its proper divisors (11823284).

13318216 is a wasteful number, since it uses less digits than its factorization.

13318216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11328 (or 11324 counting only the distinct ones).

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

The square root of 13318216 is about 3649.4131035003. The cubic root of 13318216 is about 237.0365685055.

Adding to 13318216 its reverse (61281331), we get a palindrome (74599547).

The spelling of 13318216 in words is "thirteen million, three hundred eighteen thousand, two hundred sixteen".