555891 has 16 divisors (see below), whose sum is σ = 858624. Its totient is φ = 313344.

The previous prime is 555871. The next prime is 555931. The reversal of 555891 is 198555.

It is not a de Polignac number, because 555891 - 2⁶ = 555827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (555871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2035 + ... + 2291.

It is an arithmetic number, because the mean of its divisors is an integer number (53664).

2⁵⁵⁵⁸⁹¹ is an apocalyptic number.

555891 is a deficient number, since it is larger than the sum of its proper divisors (302733).

555891 is a wasteful number, since it uses less digits than its factorization.

555891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370.

The product of its digits is 9000, while the sum is 33.

The square root of 555891 is about 745.5809815171. The cubic root of 555891 is about 82.2236113582.

The spelling of 555891 in words is "five hundred fifty-five thousand, eight hundred ninety-one".