12216232 has 48 divisors (see below), whose sum is σ = 27168480. Its totient is φ = 5044320.

The previous prime is 12216227. The next prime is 12216247. The reversal of 12216232 is 23261221.

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 11 ways as a sum of consecutive naturals, for example, 53703 + ... + 53929.

It is an arithmetic number, because the mean of its divisors is an integer number (566010).

Almost surely, 2^12216232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12216232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13584240).

12216232 is an abundant number, since it is smaller than the sum of its proper divisors (14952248).

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

12216232 is a wasteful number, since it uses less digits than its factorization.

12216232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 267 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 12216232 is about 3495.1726709849. The cubic root of 12216232 is about 230.3098030592.

Adding to 12216232 its reverse (23261221), we get a palindrome (35477453).

The spelling of 12216232 in words is "twelve million, two hundred sixteen thousand, two hundred thirty-two".