56011 has 4 divisors (see below), whose sum is σ = 56800. Its totient is φ = 55224.

The previous prime is 56009. The next prime is 56039. The reversal of 56011 is 11065.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11065 = 5 ⋅2213.

It is a cyclic number.

It is not a de Polignac number, because 56011 - 2¹ = 56009 is a prime.

It is a Duffinian number.

56011 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 55982 and 56000.

It is not an unprimeable number, because it can be changed into a prime (56041) 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, 276 + ... + 433.

It is an arithmetic number, because the mean of its divisors is an integer number (14200).

2⁵⁶⁰¹¹ is an apocalyptic number.

56011 is a deficient number, since it is larger than the sum of its proper divisors (789).

56011 is an equidigital number, since it uses as much as digits as its factorization.

56011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 56011 is about 236.6664319248. Note that the first 3 decimals coincide. The cubic root of 56011 is about 38.2611285204.

Adding to 56011 its reverse (11065), we get a palindrome (67076).

The spelling of 56011 in words is "fifty-six thousand, eleven".