12317431 has 16 divisors (see below), whose sum is σ = 14883840. Its totient is φ = 9969120.

The previous prime is 12317423. The next prime is 12317441. The reversal of 12317431 is 13471321.

It is not a de Polignac number, because 12317431 - 2³ = 12317423 is a prime.

It is a super-2 number, since 2×12317431² = 303438212879522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12317441) 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, 8896 + ... + 10186.

It is an arithmetic number, because the mean of its divisors is an integer number (930240).

Almost surely, 2^12317431 is an apocalyptic number.

12317431 is a deficient number, since it is larger than the sum of its proper divisors (2566409).

12317431 is a wasteful number, since it uses less digits than its factorization.

12317431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374.

The product of its digits is 504, while the sum is 22.

The square root of 12317431 is about 3509.6197799762. The cubic root of 12317431 is about 230.9440154678.

Adding to 12317431 its reverse (13471321), we get a palindrome (25788752).

The spelling of 12317431 in words is "twelve million, three hundred seventeen thousand, four hundred thirty-one".