13231517 has 12 divisors (see below), whose sum is σ = 14581440. Its totient is φ = 11997648.

The previous prime is 13231481. The next prime is 13231523. The reversal of 13231517 is 71513231.

It is not a de Polignac number, because 13231517 - 2⁸ = 13231261 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13231492 and 13231501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13231717) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9308 + ... + 10634.

It is an arithmetic number, because the mean of its divisors is an integer number (1215120).

Almost surely, 2^13231517 is an apocalyptic number.

It is an amenable number.

13231517 is a deficient number, since it is larger than the sum of its proper divisors (1349923).

13231517 is a wasteful number, since it uses less digits than its factorization.

13231517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412 (or 1399 counting only the distinct ones).

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

The square root of 13231517 is about 3637.5152233358. The cubic root of 13231517 is about 236.5210943256.

Adding to 13231517 its reverse (71513231), we get a palindrome (84744748).

The spelling of 13231517 in words is "thirteen million, two hundred thirty-one thousand, five hundred seventeen".