556331 has 2 divisors, whose sum is σ = 556332. Its totient is φ = 556330.

The previous prime is 556327. The next prime is 556343. The reversal of 556331 is 133655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 556331 - 2² = 556327 is a prime.

It is a super-2 number, since 2×556331² = 619008363122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 556297 and 556306.

It is not a weakly prime, because it can be changed into another prime (556321) by changing a digit.

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 as a sum of consecutive naturals, namely, 278165 + 278166.

It is an arithmetic number, because the mean of its divisors is an integer number (278166).

2⁵⁵⁶³³¹ is an apocalyptic number.

556331 is a deficient number, since it is larger than the sum of its proper divisors (1).

556331 is an equidigital number, since it uses as much as digits as its factorization.

556331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1350, while the sum is 23.

The square root of 556331 is about 745.8759950555. The cubic root of 556331 is about 82.2452995716.

Adding to 556331 its reverse (133655), we get a palindrome (689986).

The spelling of 556331 in words is "five hundred fifty-six thousand, three hundred thirty-one".