12431631 has 4 divisors (see below), whose sum is σ = 16575512. Its totient is φ = 8287752.

The previous prime is 12431621. The next prime is 12431663. The reversal of 12431631 is 13613421.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12431631 - 2⁵ = 12431599 is a prime.

It is a super-2 number, since 2×12431631² = 309090898640322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12431598 and 12431607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12431611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2071936 + ... + 2071941.

It is an arithmetic number, because the mean of its divisors is an integer number (4143878).

Almost surely, 2^12431631 is an apocalyptic number.

12431631 is a deficient number, since it is larger than the sum of its proper divisors (4143881).

12431631 is an equidigital number, since it uses as much as digits as its factorization.

12431631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4143880.

The product of its digits is 432, while the sum is 21.

The square root of 12431631 is about 3525.8518119740. The cubic root of 12431631 is about 231.6555468557.

The spelling of 12431631 in words is "twelve million, four hundred thirty-one thousand, six hundred thirty-one".