12331431 has 12 divisors (see below), whose sum is σ = 20356752. Its totient is φ = 7046496.

The previous prime is 12331391. The next prime is 12331441. The reversal of 12331431 is 13413321.

12331431 is a `hidden beast` number, since 1 + 233 + 1 + 431 = 666.

It is not a de Polignac number, because 12331431 - 2⁷ = 12331303 is a prime.

It is a super-2 number, since 2×12331431² = 304128381015522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12331441) 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 in 11 ways as a sum of consecutive naturals, for example, 97806 + ... + 97931.

It is an arithmetic number, because the mean of its divisors is an integer number (1696396).

It is a self-describing number.

Almost surely, 2^12331431 is an apocalyptic number.

12331431 is a deficient number, since it is larger than the sum of its proper divisors (8025321).

12331431 is a wasteful number, since it uses less digits than its factorization.

12331431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195750 (or 195747 counting only the distinct ones).

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

The square root of 12331431 is about 3511.6137316055. The cubic root of 12331431 is about 231.0314793778.

Adding to 12331431 its reverse (13413321), we get a palindrome (25744752).

The spelling of 12331431 in words is "twelve million, three hundred thirty-one thousand, four hundred thirty-one".