205205134 has 16 divisors (see below), whose sum is σ = 311708736. Its totient is φ = 101308000.

The previous prime is 205205069. The next prime is 205205171. The reversal of 205205134 is 431502502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85884 + ... + 88240.

It is an arithmetic number, because the mean of its divisors is an integer number (19481796).

Almost surely, 2^205205134 is an apocalyptic number.

205205134 is a deficient number, since it is larger than the sum of its proper divisors (106503602).

205205134 is a wasteful number, since it uses less digits than its factorization.

205205134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2891.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 205205134 is about 14324.9828621189. The cubic root of 205205134 is about 589.8334625243.

Adding to 205205134 its reverse (431502502), we get a palindrome (636707636).

The spelling of 205205134 in words is "two hundred five million, two hundred five thousand, one hundred thirty-four".