55000109 has 4 divisors (see below), whose sum is σ = 55097340. Its totient is φ = 54902880.

The previous prime is 55000091. The next prime is 55000111. The reversal of 55000109 is 90100055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90100055 = 5 ⋅18020011.

It can be written as a sum of positive squares in 2 ways, for example, as 29214025 + 25786084 = 5405^2 + 5078^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55000109 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 (55000129) 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, 47762 + ... + 48899.

It is an arithmetic number, because the mean of its divisors is an integer number (13774335).

Almost surely, 2^55000109 is an apocalyptic number.

It is an amenable number.

55000109 is a deficient number, since it is larger than the sum of its proper divisors (97231).

55000109 is an equidigital number, since it uses as much as digits as its factorization.

55000109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97230.

The product of its (nonzero) digits is 225, while the sum is 20.

The square root of 55000109 is about 7416.2058358705. The cubic root of 55000109 is about 380.2954973013.

The spelling of 55000109 in words is "fifty-five million, one hundred nine", and thus it is an aban number.