12217208 has 16 divisors (see below), whose sum is σ = 23166000. Its totient is φ = 6039616.

The previous prime is 12217199. The next prime is 12217211. The reversal of 12217208 is 80271221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7868 + ... + 9291.

It is an arithmetic number, because the mean of its divisors is an integer number (1447875).

Almost surely, 2^12217208 is an apocalyptic number.

It is an amenable number.

12217208 is a deficient number, since it is larger than the sum of its proper divisors (10948792).

12217208 is a wasteful number, since it uses less digits than its factorization.

12217208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17254 (or 17250 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 12217208 is about 3495.3122893384. The cubic root of 12217208 is about 230.3159363301.

Adding to 12217208 its reverse (80271221), we get a palindrome (92488429).

The spelling of 12217208 in words is "twelve million, two hundred seventeen thousand, two hundred eight".