55000205 has 12 divisors (see below), whose sum is σ = 71468820. Its totient is φ = 40614912.

The previous prime is 55000189. The next prime is 55000207. The reversal of 55000205 is 50200055.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 550564 + 54449641 = 742^2 + 7379^2 .

It is not a de Polignac number, because 55000205 - 2⁴ = 55000189 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55000207) 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, 31700 + ... + 33389.

It is an arithmetic number, because the mean of its divisors is an integer number (5955735).

Almost surely, 2^55000205 is an apocalyptic number.

It is an amenable number.

55000205 is a deficient number, since it is larger than the sum of its proper divisors (16468615).

55000205 is a wasteful number, since it uses less digits than its factorization.

55000205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65120 (or 65107 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 17.

The square root of 55000205 is about 7416.2123081800. The cubic root of 55000205 is about 380.2957185636.

The spelling of 55000205 in words is "fifty-five million, two hundred five", and thus it is an aban number.