55112111 has 4 divisors (see below), whose sum is σ = 56393832. Its totient is φ = 53830392.

The previous prime is 55112081. The next prime is 55112119. The reversal of 55112111 is 11121155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11121155 = 5 ⋅2224231.

It is a cyclic number.

It is not a de Polignac number, because 55112111 - 2²² = 50917807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55112111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55112119) 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, 640796 + ... + 640881.

It is an arithmetic number, because the mean of its divisors is an integer number (14098458).

Almost surely, 2^55112111 is an apocalyptic number.

55112111 is a deficient number, since it is larger than the sum of its proper divisors (1281721).

55112111 is a wasteful number, since it uses less digits than its factorization.

55112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281720.

The product of its digits is 50, while the sum is 17.

The square root of 55112111 is about 7423.7531613059. The cubic root of 55112111 is about 380.5534663434.

Adding to 55112111 its reverse (11121155), we get a palindrome (66233266).

The spelling of 55112111 in words is "fifty-five million, one hundred twelve thousand, one hundred eleven".