12312224 has 12 divisors (see below), whose sum is σ = 24239754. Its totient is φ = 6156096.

The previous prime is 12312221. The next prime is 12312227. The reversal of 12312224 is 42221321.

It is an interprime number because it is at equal distance from previous prime (12312221) and next prime (12312227).

It can be written as a sum of positive squares in only one way, i.e., 11102224 + 1210000 = 3332^2 + 1100^2 .

It is not an unprimeable number, because it can be changed into a prime (12312221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192347 + ... + 192410.

Almost surely, 2^12312224 is an apocalyptic number.

It is an amenable number.

12312224 is a deficient number, since it is larger than the sum of its proper divisors (11927530).

12312224 is an equidigital number, since it uses as much as digits as its factorization.

12312224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384767 (or 384759 counting only the distinct ones).

The product of its digits is 192, while the sum is 17.

The square root of 12312224 is about 3508.8778833126. The cubic root of 12312224 is about 230.9114682324.

Adding to 12312224 its reverse (42221321), we get a palindrome (54533545).

The spelling of 12312224 in words is "twelve million, three hundred twelve thousand, two hundred twenty-four".