556542223 has 4 divisors (see below), whose sum is σ = 565665928. Its totient is φ = 547418520.

The previous prime is 556542149. The next prime is 556542257. The reversal of 556542223 is 322245655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 556542223 - 2¹³ = 556534031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556549223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4561761 + ... + 4561882.

It is an arithmetic number, because the mean of its divisors is an integer number (141416482).

Almost surely, 2^556542223 is an apocalyptic number.

556542223 is a deficient number, since it is larger than the sum of its proper divisors (9123705).

556542223 is an equidigital number, since it uses as much as digits as its factorization.

556542223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9123704.

The product of its digits is 72000, while the sum is 34.

The square root of 556542223 is about 23591.1471319222. The cubic root of 556542223 is about 822.5570698537.

Adding to 556542223 its reverse (322245655), we get a palindrome (878787878).

The spelling of 556542223 in words is "five hundred fifty-six million, five hundred forty-two thousand, two hundred twenty-three".