205040234 has 32 divisors (see below), whose sum is σ = 361390080. Its totient is φ = 85436208.

The previous prime is 205040207. The next prime is 205040243. The reversal of 205040234 is 432040502.

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, 72719 + ... + 75485.

It is an arithmetic number, because the mean of its divisors is an integer number (11293440).

Almost surely, 2^205040234 is an apocalyptic number.

205040234 is a deficient number, since it is larger than the sum of its proper divisors (156349846).

205040234 is a wasteful number, since it uses less digits than its factorization.

205040234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2922.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 205040234 is about 14319.2260265700. The cubic root of 205040234 is about 589.6754261878.

Adding to 205040234 its reverse (432040502), we get a palindrome (637080736).

The spelling of 205040234 in words is "two hundred five million, forty thousand, two hundred thirty-four".