12331881 has 24 divisors (see below), whose sum is σ = 18398016. Its totient is φ = 7956000.

The previous prime is 12331871. The next prime is 12331889. The reversal of 12331881 is 18813321.

It is not a de Polignac number, because 12331881 - 2⁵ = 12331849 is a prime.

It is a super-2 number, since 2×12331881² = 304150577996322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12331889) 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 23 ways as a sum of consecutive naturals, for example, 49006 + ... + 49256.

It is an arithmetic number, because the mean of its divisors is an integer number (766584).

Almost surely, 2^12331881 is an apocalyptic number.

It is an amenable number.

12331881 is a deficient number, since it is larger than the sum of its proper divisors (6066135).

12331881 is a wasteful number, since it uses less digits than its factorization.

12331881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413 (or 410 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 12331881 is about 3511.6778041273. The cubic root of 12331881 is about 231.0342896194.

The spelling of 12331881 in words is "twelve million, three hundred thirty-one thousand, eight hundred eighty-one".