1231431332 has 12 divisors (see below), whose sum is σ = 2175927936. Its totient is φ = 609737640.

The previous prime is 1231431319. The next prime is 1231431353. The reversal of 1231431332 is 2331341321.

It is a junction number, because it is equal to n+sod(n) for n = 1231431298 and 1231431307.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1494044 + ... + 1494867.

It is an arithmetic number, because the mean of its divisors is an integer number (181327328).

Almost surely, 2^1231431332 is an apocalyptic number.

It is an amenable number.

1231431332 is a deficient number, since it is larger than the sum of its proper divisors (944496604).

1231431332 is a wasteful number, since it uses less digits than its factorization.

1231431332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2989018 (or 2989016 counting only the distinct ones).

The product of its digits is 1296, while the sum is 23.

The square root of 1231431332 is about 35091.7558979314. The cubic root of 1231431332 is about 1071.8567151349.

Adding to 1231431332 its reverse (2331341321), we get a palindrome (3562772653).

The spelling of 1231431332 in words is "one billion, two hundred thirty-one million, four hundred thirty-one thousand, three hundred thirty-two".