56911 has 2 divisors, whose sum is σ = 56912. Its totient is φ = 56910.

The previous prime is 56909. The next prime is 56921. The reversal of 56911 is 11965.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56911 - 2¹ = 56909 is a prime.

Together with 56909, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56921) 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 as a sum of consecutive naturals, namely, 28455 + 28456.

It is an arithmetic number, because the mean of its divisors is an integer number (28456).

2⁵⁶⁹¹¹ is an apocalyptic number.

56911 is a deficient number, since it is larger than the sum of its proper divisors (1).

56911 is an equidigital number, since it uses as much as digits as its factorization.

56911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270, while the sum is 22.

The square root of 56911 is about 238.5602649227. The cubic root of 56911 is about 38.4649706681.

The spelling of 56911 in words is "fifty-six thousand, nine hundred eleven".