13281517 has 2 divisors, whose sum is σ = 13281518. Its totient is φ = 13281516.

The previous prime is 13281497. The next prime is 13281523. The reversal of 13281517 is 71518231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9205156 + 4076361 = 3034^2 + 2019^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13281517 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13281017) 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 as a sum of consecutive naturals, namely, 6640758 + 6640759.

It is an arithmetic number, because the mean of its divisors is an integer number (6640759).

Almost surely, 2^13281517 is an apocalyptic number.

It is an amenable number.

13281517 is a deficient number, since it is larger than the sum of its proper divisors (1).

13281517 is an equidigital number, since it uses as much as digits as its factorization.

13281517 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 13281517 is about 3644.3815661920. The cubic root of 13281517 is about 236.8186462387.

Adding to 13281517 its reverse (71518231), we get a palindrome (84799748).

The spelling of 13281517 in words is "thirteen million, two hundred eighty-one thousand, five hundred seventeen".