556811 has 2 divisors, whose sum is σ = 556812. Its totient is φ = 556810.

The previous prime is 556799. The next prime is 556817. The reversal of 556811 is 118655.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556811 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 556811.

It is not a weakly prime, because it can be changed into another prime (556817) 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, 278405 + 278406.

It is an arithmetic number, because the mean of its divisors is an integer number (278406).

2⁵⁵⁶⁸¹¹ is an apocalyptic number.

556811 is a deficient number, since it is larger than the sum of its proper divisors (1).

556811 is an equidigital number, since it uses as much as digits as its factorization.

556811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 26.

The square root of 556811 is about 746.1976949844. The cubic root of 556811 is about 82.2689464026.

The spelling of 556811 in words is "five hundred fifty-six thousand, eight hundred eleven".