12556223 has 2 divisors, whose sum is σ = 12556224. Its totient is φ = 12556222.

The previous prime is 12556213. The next prime is 12556231. The reversal of 12556223 is 32265521.

It is a strong prime.

It is an emirp because it is prime and its reverse (32265521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12556223 - 2¹⁰ = 12555199 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12556192 and 12556201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12556213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6278111 + 6278112.

It is an arithmetic number, because the mean of its divisors is an integer number (6278112).

Almost surely, 2^12556223 is an apocalyptic number.

12556223 is a deficient number, since it is larger than the sum of its proper divisors (1).

12556223 is an equidigital number, since it uses as much as digits as its factorization.

12556223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 26.

The square root of 12556223 is about 3543.4761181642. The cubic root of 12556223 is about 232.4268733681.

The spelling of 12556223 in words is "twelve million, five hundred fifty-six thousand, two hundred twenty-three".