56111 has 4 divisors (see below), whose sum is σ = 61224. Its totient is φ = 51000.

The previous prime is 56101. The next prime is 56113. The reversal of 56111 is 11165.

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 56111 - 2¹⁴ = 39727 is a prime.

It is a Duffinian number.

56111 is a modest number, since divided by 111 gives 56 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56113) 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 3 ways as a sum of consecutive naturals, for example, 2540 + ... + 2561.

It is an arithmetic number, because the mean of its divisors is an integer number (15306).

2⁵⁶¹¹¹ is an apocalyptic number.

56111 is a deficient number, since it is larger than the sum of its proper divisors (5113).

56111 is a wasteful number, since it uses less digits than its factorization.

56111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5112.

The product of its digits is 30, while the sum is 14.

The square root of 56111 is about 236.8776055266. The cubic root of 56111 is about 38.2838849915.

Adding to 56111 its reverse (11165), we get a palindrome (67276).

It can be divided in two parts, 56 and 111, that multiplied together give a triangular number (6216 = T₁₁₁).

The spelling of 56111 in words is "fifty-six thousand, one hundred eleven".