12216504 has 32 divisors (see below), whose sum is σ = 30752640. Its totient is φ = 4044000.

The previous prime is 12216499. The next prime is 12216539. The reversal of 12216504 is 40561221.

12216504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1939 + ... + 5309.

It is an arithmetic number, because the mean of its divisors is an integer number (961020).

Almost surely, 2^12216504 is an apocalyptic number.

It is an amenable number.

12216504 is an abundant number, since it is smaller than the sum of its proper divisors (18536136).

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

12216504 is a wasteful number, since it uses less digits than its factorization.

12216504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3531 (or 3527 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 12216504 is about 3495.2115815784. The cubic root of 12216504 is about 230.3115123642.

Adding to 12216504 its reverse (40561221), we get a palindrome (52777725).

It can be divided in two parts, 12216 and 504, that added together give a triangular number (12720 = T₁₅₉).

The spelling of 12216504 in words is "twelve million, two hundred sixteen thousand, five hundred four".