12331631 has 8 divisors (see below), whose sum is σ = 13335504. Its totient is φ = 11335680.

The previous prime is 12331621. The next prime is 12331639. The reversal of 12331631 is 13613321.

It is a happy number.

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 12331631 - 2¹⁸ = 12069487 is a prime.

It is a super-2 number, since 2×12331631² = 304138246240322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12331639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1496 + ... + 5186.

It is an arithmetic number, because the mean of its divisors is an integer number (1666938).

It is a self-describing number.

Almost surely, 2^12331631 is an apocalyptic number.

12331631 is a deficient number, since it is larger than the sum of its proper divisors (1003873).

12331631 is a wasteful number, since it uses less digits than its factorization.

12331631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3961.

The product of its digits is 324, while the sum is 20.

The square root of 12331631 is about 3511.6422084261. The cubic root of 12331631 is about 231.0327283825.

Adding to 12331631 its reverse (13613321), we get a palindrome (25944952).

The spelling of 12331631 in words is "twelve million, three hundred thirty-one thousand, six hundred thirty-one".