555081 has 4 divisors (see below), whose sum is σ = 740112. Its totient is φ = 370052.

The previous prime is 555077. The next prime is 555083. The reversal of 555081 is 180555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 555081 - 2² = 555077 is a prime.

It is a super-2 number, since 2×555081² = 616229833122, which contains 22 as substring.

It is a D-number.

555081 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (555083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92511 + ... + 92516.

It is an arithmetic number, because the mean of its divisors is an integer number (185028).

2⁵⁵⁵⁰⁸¹ is an apocalyptic number.

It is an amenable number.

555081 is a deficient number, since it is larger than the sum of its proper divisors (185031).

555081 is a wasteful number, since it uses less digits than its factorization.

555081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185030.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 555081 is about 745.0375829446. The cubic root of 555081 is about 82.1836553836.

The spelling of 555081 in words is "five hundred fifty-five thousand, eighty-one".