556031 has 4 divisors (see below), whose sum is σ = 635472. Its totient is φ = 476592.

The previous prime is 556027. The next prime is 556037. The reversal of 556031 is 130655.

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

It is a cyclic number.

It is not a de Polignac number, because 556031 - 2² = 556027 is a prime.

It is a super-3 number, since 3×556031³ = 515725101752933373, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 555994 and 556012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556037) 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, 39710 + ... + 39723.

It is an arithmetic number, because the mean of its divisors is an integer number (158868).

2⁵⁵⁶⁰³¹ is an apocalyptic number.

556031 is a deficient number, since it is larger than the sum of its proper divisors (79441).

556031 is an equidigital number, since it uses as much as digits as its factorization.

556031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79440.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 556031 is about 745.6748621216. The cubic root of 556031 is about 82.2305133943.

Adding to 556031 its reverse (130655), we get a palindrome (686686).

It can be divided in two parts, 55 and 6031, that multiplied together give a triangular number (331705 = T₈₁₄).

The spelling of 556031 in words is "five hundred fifty-six thousand, thirty-one".