556168231 has 2 divisors, whose sum is σ = 556168232. Its totient is φ = 556168230.

The previous prime is 556168211. The next prime is 556168289. The reversal of 556168231 is 132861655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 556168231 - 2⁵ = 556168199 is a prime.

It is a super-2 number, since 2×556168231² = 618646202347338722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556168211) 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 as a sum of consecutive naturals, namely, 278084115 + 278084116.

It is an arithmetic number, because the mean of its divisors is an integer number (278084116).

Almost surely, 2^556168231 is an apocalyptic number.

556168231 is a deficient number, since it is larger than the sum of its proper divisors (1).

556168231 is an equidigital number, since it uses as much as digits as its factorization.

556168231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 37.

The square root of 556168231 is about 23583.2192670975. The cubic root of 556168231 is about 822.3727779379.

The spelling of 556168231 in words is "five hundred fifty-six million, one hundred sixty-eight thousand, two hundred thirty-one".