12431313 has 20 divisors (see below), whose sum is σ = 18701760. Its totient is φ = 8228952.

The previous prime is 12431281. The next prime is 12431317. The reversal of 12431313 is 31313421.

It is not a de Polignac number, because 12431313 - 2⁵ = 12431281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12431317) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13068 + ... + 13986.

It is an arithmetic number, because the mean of its divisors is an integer number (935088).

Almost surely, 2^12431313 is an apocalyptic number.

It is an amenable number.

12431313 is a deficient number, since it is larger than the sum of its proper divisors (6270447).

12431313 is an equidigital number, since it uses as much as digits as its factorization.

12431313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098 (or 1089 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 12431313 is about 3525.8067161999. The cubic root of 12431313 is about 231.6535715962.

Adding to 12431313 its reverse (31313421), we get a palindrome (43744734).

It can be divided in two parts, 1243 and 1313, that added together give a triangular number (2556 = T₇₁).

The spelling of 12431313 in words is "twelve million, four hundred thirty-one thousand, three hundred thirteen".