556331123 has 4 divisors (see below), whose sum is σ = 557003040. Its totient is φ = 555659208.

The previous prime is 556331117. The next prime is 556331131. The reversal of 556331123 is 321133655.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556331123 is a prime.

It is a super-2 number, since 2×556331123² = 619008636836882258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556331183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334715 + ... + 336372.

It is an arithmetic number, because the mean of its divisors is an integer number (139250760).

Almost surely, 2^556331123 is an apocalyptic number.

556331123 is a deficient number, since it is larger than the sum of its proper divisors (671917).

556331123 is an equidigital number, since it uses as much as digits as its factorization.

556331123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671916.

The product of its digits is 8100, while the sum is 29.

The square root of 556331123 is about 23586.6725716028. The cubic root of 556331123 is about 822.4530563280.

Adding to 556331123 its reverse (321133655), we get a palindrome (877464778).

The spelling of 556331123 in words is "five hundred fifty-six million, three hundred thirty-one thousand, one hundred twenty-three".