205020205 has 16 divisors (see below), whose sum is σ = 273498624. Its totient is φ = 146514240.

The previous prime is 205020197. The next prime is 205020223. The reversal of 205020205 is 502020502.

It is not a de Polignac number, because 205020205 - 2³ = 205020197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 48859 + ... + 52888.

It is an arithmetic number, because the mean of its divisors is an integer number (17093664).

Almost surely, 2^205020205 is an apocalyptic number.

It is an amenable number.

205020205 is a deficient number, since it is larger than the sum of its proper divisors (68478419).

205020205 is a wasteful number, since it uses less digits than its factorization.

205020205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101796.

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 205020205 is about 14318.5266350976. The cubic root of 205020205 is about 589.6562250885.

Adding to 205020205 its reverse (502020502), we get a palindrome (707040707).

The spelling of 205020205 in words is "two hundred five million, twenty thousand, two hundred five".