12216502 has 8 divisors (see below), whose sum is σ = 18493200. Its totient is φ = 6052104.

The previous prime is 12216499. The next prime is 12216539. The reversal of 12216502 is 20561221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12216502² = 298485842232008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12216502.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 27802 + ... + 28237.

It is an arithmetic number, because the mean of its divisors is an integer number (2311650).

Almost surely, 2^12216502 is an apocalyptic number.

12216502 is a deficient number, since it is larger than the sum of its proper divisors (6276698).

12216502 is a wasteful number, since it uses less digits than its factorization.

12216502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56150.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 12216502 is about 3495.2112954727. The cubic root of 12216502 is about 230.3114997959.

Adding to 12216502 its reverse (20561221), we get a palindrome (32777723).

The spelling of 12216502 in words is "twelve million, two hundred sixteen thousand, five hundred two".