12217516 has 12 divisors (see below), whose sum is σ = 21427000. Its totient is φ = 6095520.

The previous prime is 12217481. The next prime is 12217529. The reversal of 12217516 is 61571221.

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, 1065 + ... + 5056.

Almost surely, 2^12217516 is an apocalyptic number.

It is an amenable number.

12217516 is a deficient number, since it is larger than the sum of its proper divisors (9209484).

12217516 is a wasteful number, since it uses less digits than its factorization.

12217516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6624 (or 6622 counting only the distinct ones).

The product of its digits is 840, while the sum is 25.

The square root of 12217516 is about 3495.3563480710. The cubic root of 12217516 is about 230.3178717617.

Adding to 12217516 its reverse (61571221), we get a palindrome (73788737).

The spelling of 12217516 in words is "twelve million, two hundred seventeen thousand, five hundred sixteen".