13311218 has 8 divisors (see below), whose sum is σ = 19999020. Its totient is φ = 6644880.

The previous prime is 13311217. The next prime is 13311223. The reversal of 13311218 is 81211331.

It can be written as a sum of positive squares in 2 ways, for example, as 13300609 + 10609 = 3647^2 + 103^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13311218.

It is not an unprimeable number, because it can be changed into a prime (13311217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3713 + ... + 6356.

Almost surely, 2^13311218 is an apocalyptic number.

13311218 is a deficient number, since it is larger than the sum of its proper divisors (6687802).

13311218 is a wasteful number, since it uses less digits than its factorization.

13311218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10732.

The product of its digits is 144, while the sum is 20.

The square root of 13311218 is about 3648.4541932166. The cubic root of 13311218 is about 236.9950446126.

Adding to 13311218 its reverse (81211331), we get a palindrome (94522549).

The spelling of 13311218 in words is "thirteen million, three hundred eleven thousand, two hundred eighteen".