55105123 has 4 divisors (see below), whose sum is σ = 55186488. Its totient is φ = 55023760.

The previous prime is 55105097. The next prime is 55105147. The reversal of 55105123 is 32150155.

55105123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 55105123 - 2⁵ = 55105091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55105094 and 55105103.

It is not an unprimeable number, because it can be changed into a prime (55105153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39658 + ... + 41023.

It is an arithmetic number, because the mean of its divisors is an integer number (13796622).

Almost surely, 2^55105123 is an apocalyptic number.

55105123 is a deficient number, since it is larger than the sum of its proper divisors (81365).

55105123 is an equidigital number, since it uses as much as digits as its factorization.

55105123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81364.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 55105123 is about 7423.2824949614. The cubic root of 55105123 is about 380.5373814335.

Adding to 55105123 its reverse (32150155), we get a palindrome (87255278).

The spelling of 55105123 in words is "fifty-five million, one hundred five thousand, one hundred twenty-three".