205173255 has 64 divisors (see below), whose sum is σ = 400619520. Its totient is φ = 87527424.

The previous prime is 205173239. The next prime is 205173259. The reversal of 205173255 is 552371502.

It is not a de Polignac number, because 205173255 - 2⁴ = 205173239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205173259) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 244126 + ... + 244964.

It is an arithmetic number, because the mean of its divisors is an integer number (6259680).

Almost surely, 2^205173255 is an apocalyptic number.

205173255 is a deficient number, since it is larger than the sum of its proper divisors (195446265).

205173255 is a wasteful number, since it uses less digits than its factorization.

205173255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008.

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 205173255 is about 14323.8701125080. The cubic root of 205173255 is about 589.8029170333.

The spelling of 205173255 in words is "two hundred five million, one hundred seventy-three thousand, two hundred fifty-five".