12231664 has 20 divisors (see below), whose sum is σ = 23764104. Its totient is φ = 6099008.

The previous prime is 12231647. The next prime is 12231671. The reversal of 12231664 is 46613221.

It is a super-2 number, since 2×12231664² = 299227208417792, which contains 22 as substring.

It is a congruent number.

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, 6654 + ... + 8290.

Almost surely, 2^12231664 is an apocalyptic number.

It is an amenable number.

12231664 is a deficient number, since it is larger than the sum of its proper divisors (11532440).

12231664 is a wasteful number, since it uses less digits than its factorization.

12231664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112 (or 2106 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 12231664 is about 3497.3795904934. The cubic root of 12231664 is about 230.4067408972.

Adding to 12231664 its reverse (46613221), we get a palindrome (58844885).

The spelling of 12231664 in words is "twelve million, two hundred thirty-one thousand, six hundred sixty-four".