55105111 has 12 divisors (see below), whose sum is σ = 58852120. Its totient is φ = 51453360.

The previous prime is 55105097. The next prime is 55105147. The reversal of 55105111 is 11150155.

It is a happy number.

It is not a de Polignac number, because 55105111 - 2¹¹ = 55103063 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55105181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130681 + ... + 131101.

Almost surely, 2^55105111 is an apocalyptic number.

55105111 is a deficient number, since it is larger than the sum of its proper divisors (3747009).

55105111 is an equidigital number, since it uses as much as digits as its factorization.

55105111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 19.

The square root of 55105111 is about 7423.2816866936. The cubic root of 55105111 is about 380.5373538108.

Adding to 55105111 its reverse (11150155), we get a palindrome (66255266).

The spelling of 55105111 in words is "fifty-five million, one hundred five thousand, one hundred eleven".