555881 has 4 divisors (see below), whose sum is σ = 557700. Its totient is φ = 554064.

The previous prime is 555871. The next prime is 555931. The reversal of 555881 is 188555.

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

It can be written as a sum of positive squares in 2 ways, for example, as 78400 + 477481 = 280^2 + 691^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-555881 is a prime.

It is a super-2 number, since 2×555881² = 618007372322, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 555881.

It is not an unprimeable number, because it can be changed into a prime (555871) 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 3 ways as a sum of consecutive naturals, for example, 326 + ... + 1103.

It is an arithmetic number, because the mean of its divisors is an integer number (139425).

2⁵⁵⁵⁸⁸¹ is an apocalyptic number.

It is an amenable number.

555881 is a deficient number, since it is larger than the sum of its proper divisors (1819).

555881 is a wasteful number, since it uses less digits than its factorization.

555881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818.

The product of its digits is 8000, while the sum is 32.

The square root of 555881 is about 745.5742753073. The cubic root of 555881 is about 82.2231183113.

The spelling of 555881 in words is "five hundred fifty-five thousand, eight hundred eighty-one".