56111111 has 8 divisors (see below), whose sum is σ = 64217760. Its totient is φ = 48027168.

The previous prime is 56111063. The next prime is 56111141. The reversal of 56111111 is 11111165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56111111 - 2¹⁸ = 55848967 is a prime.

It is a Duffinian number.

56111111 is a modest number, since divided by 11111 gives 561 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 56111111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56111141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5 + ... + 10593.

It is an arithmetic number, because the mean of its divisors is an integer number (8027220).

Almost surely, 2^56111111 is an apocalyptic number.

56111111 is a deficient number, since it is larger than the sum of its proper divisors (8106649).

56111111 is a wasteful number, since it uses less digits than its factorization.

56111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11353.

The product of its digits is 30, while the sum is 17.

The square root of 56111111 is about 7490.7350106648. The cubic root of 56111111 is about 382.8391023612.

Adding to 56111111 its reverse (11111165), we get a palindrome (67222276).

It can be divided in two parts, 5 and 6111111, that added together give a palindrome (6111116).

The spelling of 56111111 in words is "fifty-six million, one hundred eleven thousand, one hundred eleven".