55511110111 has 4 divisors (see below), whose sum is σ = 55657577800. Its totient is φ = 55364642424.

The previous prime is 55511110093. The next prime is 55511110129. The reversal of 55511110111 is 11101111555.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (55511110093) and next prime (55511110129).

It is a cyclic number.

It is not a de Polignac number, because 55511110111 - 2⁵ = 55511110079 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 (55511110141) 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, 73233276 + ... + 73234033.

It is an arithmetic number, because the mean of its divisors is an integer number (13914394450).

Almost surely, 2^55511110111 is an apocalyptic number.

55511110111 is a deficient number, since it is larger than the sum of its proper divisors (146467689).

55511110111 is a wasteful number, since it uses less digits than its factorization.

55511110111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146467688.

The product of its (nonzero) digits is 125, while the sum is 22.

Adding to 55511110111 its reverse (11101111555), we get a palindrome (66612221666).

The spelling of 55511110111 in words is "fifty-five billion, five hundred eleven million, one hundred ten thousand, one hundred eleven".