56556 has 18 divisors (see below), whose sum is σ = 143052. Its totient is φ = 18840.

The previous prime is 56543. The next prime is 56569. The reversal of 56556 is 65565.

56556 is a `hidden beast` number, since 5 + 655 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (56543) and next prime (56569).

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

It is a super-2 number, since 2×56556² = 6397162272, which contains 22 as substring.

It is a nialpdrome in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 750 + ... + 821.

2⁵⁶⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

56556 is an abundant number, since it is smaller than the sum of its proper divisors (86496).

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

56556 is a wasteful number, since it uses less digits than its factorization.

56556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581 (or 1576 counting only the distinct ones).

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

The square root of 56556 is about 237.8150541913. The cubic root of 56556 is about 38.3848247329.

Subtracting 56556 from its reverse (65565), we obtain a palindrome (9009).

It can be divided in two parts, 5655 and 6, that multiplied together give a triangular number (33930 = T₂₆₀).

The spelling of 56556 in words is "fifty-six thousand, five hundred fifty-six".