12223216 has 20 divisors (see below), whose sum is σ = 23915632. Its totient is φ = 6051456.

The previous prime is 12223199. The next prime is 12223271. The reversal of 12223216 is 61232221.

It is a junction number, because it is equal to n+sod(n) for n = 12223193 and 12223202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2061 + ... + 5356.

Almost surely, 2^12223216 is an apocalyptic number.

12223216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12223216 is a deficient number, since it is larger than the sum of its proper divisors (11692416).

12223216 is a wasteful number, since it uses less digits than its factorization.

12223216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7528 (or 7522 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 12223216 is about 3496.1716205015. The cubic root of 12223216 is about 230.3536839448.

Adding to 12223216 its reverse (61232221), we get a palindrome (73455437).

The spelling of 12223216 in words is "twelve million, two hundred twenty-three thousand, two hundred sixteen".