13518217 has 2 divisors, whose sum is σ = 13518218. Its totient is φ = 13518216.

The previous prime is 13518203. The next prime is 13518221. The reversal of 13518217 is 71281531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8549776 + 4968441 = 2924^2 + 2229^2 .

It is a cyclic number.

It is not a de Polignac number, because 13518217 - 2¹⁵ = 13485449 is a prime.

It is not a weakly prime, because it can be changed into another prime (13518277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6759108 + 6759109.

It is an arithmetic number, because the mean of its divisors is an integer number (6759109).

Almost surely, 2^13518217 is an apocalyptic number.

It is an amenable number.

13518217 is a deficient number, since it is larger than the sum of its proper divisors (1).

13518217 is an equidigital number, since it uses as much as digits as its factorization.

13518217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 28.

The square root of 13518217 is about 3676.7127981391. The cubic root of 13518217 is about 238.2172121932.

Adding to 13518217 its reverse (71281531), we get a palindrome (84799748).

The spelling of 13518217 in words is "thirteen million, five hundred eighteen thousand, two hundred seventeen".