56005111 has 4 divisors (see below), whose sum is σ = 56081232. Its totient is φ = 55928992.

The previous prime is 56005063. The next prime is 56005129. The reversal of 56005111 is 11150065.

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 56005111 - 2¹⁹ = 55480823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56005171) 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, 36946 + ... + 38431.

It is an arithmetic number, because the mean of its divisors is an integer number (14020308).

Almost surely, 2^56005111 is an apocalyptic number.

56005111 is a deficient number, since it is larger than the sum of its proper divisors (76121).

56005111 is an equidigital number, since it uses as much as digits as its factorization.

56005111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76120.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 56005111 is about 7483.6562588083. The cubic root of 56005111 is about 382.5978754757.

Adding to 56005111 its reverse (11150065), we get a palindrome (67155176).

The spelling of 56005111 in words is "fifty-six million, five thousand, one hundred eleven".