56810111 has 2 divisors, whose sum is σ = 56810112. Its totient is φ = 56810110.

The previous prime is 56810099. The next prime is 56810113. The reversal of 56810111 is 11101865.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56810111 is a prime.

Together with 56810113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56810113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28405055 + 28405056.

It is an arithmetic number, because the mean of its divisors is an integer number (28405056).

Almost surely, 2^56810111 is an apocalyptic number.

56810111 is a deficient number, since it is larger than the sum of its proper divisors (1).

56810111 is an equidigital number, since it uses as much as digits as its factorization.

56810111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 23.

The square root of 56810111 is about 7537.2482379181. The cubic root of 56810111 is about 384.4222762570.

Adding to 56810111 its reverse (11101865), we get a palindrome (67911976).

The spelling of 56810111 in words is "fifty-six million, eight hundred ten thousand, one hundred eleven".