12331731 has 8 divisors (see below), whose sum is σ = 16459200. Its totient is φ = 8212712.

The previous prime is 12331727. The next prime is 12331733. The reversal of 12331731 is 13713321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12331731 - 2² = 12331727 is a prime.

It is a super-2 number, since 2×12331731² = 304143178912722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12331698 and 12331707.

It is not an unprimeable number, because it can be changed into a prime (12331733) 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 7 ways as a sum of consecutive naturals, for example, 3220 + ... + 5918.

It is an arithmetic number, because the mean of its divisors is an integer number (2057400).

It is a self-describing number.

Almost surely, 2^12331731 is an apocalyptic number.

12331731 is a deficient number, since it is larger than the sum of its proper divisors (4127469).

12331731 is a wasteful number, since it uses less digits than its factorization.

12331731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4225.

The product of its digits is 378, while the sum is 21.

The square root of 12331731 is about 3511.6564467499. The cubic root of 12331731 is about 231.0333528798.

The spelling of 12331731 in words is "twelve million, three hundred thirty-one thousand, seven hundred thirty-one".