12331224 has 32 divisors (see below), whose sum is σ = 34254000. Its totient is φ = 4110336.

The previous prime is 12331223. The next prime is 12331237. The reversal of 12331224 is 42213321.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 12331197 and 12331206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12331223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28329 + ... + 28760.

Almost surely, 2^12331224 is an apocalyptic number.

It is an amenable number.

12331224 is an abundant number, since it is smaller than the sum of its proper divisors (21922776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12331224 is a wasteful number, since it uses less digits than its factorization.

12331224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57104 (or 57094 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 12331224 is about 3511.5842578529. The cubic root of 12331224 is about 231.0301866437.

Adding to 12331224 its reverse (42213321), we get a palindrome (54544545).

The spelling of 12331224 in words is "twelve million, three hundred thirty-one thousand, two hundred twenty-four".