12223566 has 12 divisors (see below), whose sum is σ = 26484432. Its totient is φ = 4074516.

The previous prime is 12223553. The next prime is 12223571. The reversal of 12223566 is 66532221.

It is a Curzon number.

It is a plaindrome in base 10.

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 5 ways as a sum of consecutive naturals, for example, 339526 + ... + 339561.

It is an arithmetic number, because the mean of its divisors is an integer number (2207036).

Almost surely, 2^12223566 is an apocalyptic number.

12223566 is an abundant number, since it is smaller than the sum of its proper divisors (14260866).

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

12223566 is a wasteful number, since it uses less digits than its factorization.

12223566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679095 (or 679092 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 12223566 is about 3496.2216748942. The cubic root of 12223566 is about 230.3558825757.

Adding to 12223566 its reverse (66532221), we get a palindrome (78755787).

The spelling of 12223566 in words is "twelve million, two hundred twenty-three thousand, five hundred sixty-six".