56775 has 12 divisors (see below), whose sum is σ = 93992. Its totient is φ = 30240.

The previous prime is 56773. The next prime is 56779. The reversal of 56775 is 57765.

It is not a de Polignac number, because 56775 - 2¹ = 56773 is a prime.

It is a Duffinian number.

56775 is a lucky number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56773) 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, 304 + ... + 453.

2⁵⁶⁷⁷⁵ is an apocalyptic number.

56775 is a deficient number, since it is larger than the sum of its proper divisors (37217).

56775 is a wasteful number, since it uses less digits than its factorization.

56775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770 (or 765 counting only the distinct ones).

The product of its digits is 7350, while the sum is 30.

The square root of 56775 is about 238.2750511489. The cubic root of 56775 is about 38.4343063643.

Subtracting 56775 from its reverse (57765), we obtain a triangular number (990 = T₄₄).

The spelling of 56775 in words is "fifty-six thousand, seven hundred seventy-five".