13217513 has 2 divisors, whose sum is σ = 13217514. Its totient is φ = 13217512.

The previous prime is 13217509. The next prime is 13217531. The reversal of 13217513 is 31571231.

Together with next prime (13217531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12759184 + 458329 = 3572^2 + 677^2 .

It is a cyclic number.

It is not a de Polignac number, because 13217513 - 2² = 13217509 is a prime.

It is not a weakly prime, because it can be changed into another prime (13217543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6608756 + 6608757.

It is an arithmetic number, because the mean of its divisors is an integer number (6608757).

Almost surely, 2^13217513 is an apocalyptic number.

It is an amenable number.

13217513 is a deficient number, since it is larger than the sum of its proper divisors (1).

13217513 is an equidigital number, since it uses as much as digits as its factorization.

13217513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 630, while the sum is 23.

The square root of 13217513 is about 3635.5897733380. The cubic root of 13217513 is about 236.4376216437.

Adding to 13217513 its reverse (31571231), we get a palindrome (44788744).

The spelling of 13217513 in words is "thirteen million, two hundred seventeen thousand, five hundred thirteen".