556881 has 16 divisors (see below), whose sum is σ = 813120. Its totient is φ = 336960.

The previous prime is 556867. The next prime is 556883. The reversal of 556881 is 188655.

It is not a de Polignac number, because 556881 - 2⁵ = 556849 is a prime.

It is a super-2 number, since 2×556881² = 620232896322, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 556881.

It is not an unprimeable number, because it can be changed into a prime (556883) 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 in 15 ways as a sum of consecutive naturals, for example, 4186 + ... + 4316.

It is an arithmetic number, because the mean of its divisors is an integer number (50820).

2⁵⁵⁶⁸⁸¹ is an apocalyptic number.

It is an amenable number.

556881 is a deficient number, since it is larger than the sum of its proper divisors (256239).

556881 is a wasteful number, since it uses less digits than its factorization.

556881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256.

The product of its digits is 9600, while the sum is 33.

The square root of 556881 is about 746.2445979704. The cubic root of 556881 is about 82.2723937632.

The spelling of 556881 in words is "five hundred fifty-six thousand, eight hundred eighty-one".