13431513 has 16 divisors (see below), whose sum is σ = 19063296. Its totient is φ = 8382720.

The previous prime is 13431503. The next prime is 13431521. The reversal of 13431513 is 31513431.

It is not a de Polignac number, because 13431513 - 2⁴ = 13431497 is a prime.

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 13431513.

It is not an unprimeable number, because it can be changed into a prime (13431503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10783 + ... + 11963.

It is an arithmetic number, because the mean of its divisors is an integer number (1191456).

Almost surely, 2^13431513 is an apocalyptic number.

It is an amenable number.

13431513 is a deficient number, since it is larger than the sum of its proper divisors (5631783).

13431513 is a wasteful number, since it uses less digits than its factorization.

13431513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424.

The product of its digits is 540, while the sum is 21.

The square root of 13431513 is about 3664.9028636514. The cubic root of 13431513 is about 237.7068218726.

Adding to 13431513 its reverse (31513431), we get a palindrome (44944944).

The spelling of 13431513 in words is "thirteen million, four hundred thirty-one thousand, five hundred thirteen".