12216532 has 12 divisors (see below), whose sum is σ = 21406420. Its totient is φ = 6100416.

The previous prime is 12216499. The next prime is 12216539. The reversal of 12216532 is 23561221.

12216532 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6990736 + 5225796 = 2644^2 + 2286^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12216539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2848 + ... + 5704.

Almost surely, 2^12216532 is an apocalyptic number.

It is an amenable number.

12216532 is a deficient number, since it is larger than the sum of its proper divisors (9189888).

12216532 is a wasteful number, since it uses less digits than its factorization.

12216532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3930 (or 3928 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 12216532 is about 3495.2155870561. The cubic root of 12216532 is about 230.3116883207.

Adding to 12216532 its reverse (23561221), we get a palindrome (35777753).

The spelling of 12216532 in words is "twelve million, two hundred sixteen thousand, five hundred thirty-two".