205525165 has 16 divisors (see below), whose sum is σ = 256519296. Its totient is φ = 157953600.

The previous prime is 205525157. The next prime is 205525193. The reversal of 205525165 is 561525502.

It is not a de Polignac number, because 205525165 - 2³ = 205525157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5280 + ... + 20950.

It is an arithmetic number, because the mean of its divisors is an integer number (16032456).

Almost surely, 2^205525165 is an apocalyptic number.

It is an amenable number.

205525165 is a deficient number, since it is larger than the sum of its proper divisors (50994131).

205525165 is a wasteful number, since it uses less digits than its factorization.

205525165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15780.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 205525165 is about 14336.1488901308. The cubic root of 205525165 is about 590.1399313792.

The spelling of 205525165 in words is "two hundred five million, five hundred twenty-five thousand, one hundred sixty-five".