506556 has 18 divisors (see below), whose sum is σ = 1280552. Its totient is φ = 168840.

The previous prime is 506551. The next prime is 506563. The reversal of 506556 is 655605.

506556 is a `hidden beast` number, since 5 + 0 + 655 + 6 = 666.

506556 is nontrivially palindromic in base 5.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×506556² = 513197962272, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506551) by changing a digit.

506556 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7000 + ... + 7071.

2⁵⁰⁶⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

506556 is an abundant number, since it is smaller than the sum of its proper divisors (773996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

506556 is a wasteful number, since it uses less digits than its factorization.

506556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14081 (or 14076 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 506556 is about 711.7274759344. The cubic root of 506556 is about 79.7154474061.

The spelling of 506556 in words is "five hundred six thousand, five hundred fifty-six".