555381 has 12 divisors (see below), whose sum is σ = 837408. Its totient is φ = 354024.

The previous prime is 555361. The next prime is 555383. The reversal of 555381 is 183555.

It is not a de Polignac number, because 555381 - 2⁵ = 555349 is a prime.

It is a super-2 number, since 2×555381² = 616896110322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 555381.

It is not an unprimeable number, because it can be changed into a prime (555383) 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 11 ways as a sum of consecutive naturals, for example, 1135 + ... + 1548.

It is an arithmetic number, because the mean of its divisors is an integer number (69784).

2⁵⁵⁵³⁸¹ is an apocalyptic number.

It is an amenable number.

555381 is a deficient number, since it is larger than the sum of its proper divisors (282027).

555381 is a wasteful number, since it uses less digits than its factorization.

555381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2712 (or 2709 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 555381 is about 745.2388878742. The cubic root of 555381 is about 82.1984584221.

The spelling of 555381 in words is "five hundred fifty-five thousand, three hundred eighty-one".