205724275 has 12 divisors (see below), whose sum is σ = 258693264. Its totient is φ = 162260000.

The previous prime is 205724261. The next prime is 205724287. The reversal of 205724275 is 572427502.

It is a happy number.

It is not a de Polignac number, because 205724275 - 2¹³ = 205716083 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205724275.

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 11 ways as a sum of consecutive naturals, for example, 56176 + ... + 59725.

It is an arithmetic number, because the mean of its divisors is an integer number (21557772).

Almost surely, 2^205724275 is an apocalyptic number.

205724275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

205724275 is a deficient number, since it is larger than the sum of its proper divisors (52968989).

205724275 is a wasteful number, since it uses less digits than its factorization.

205724275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115982 (or 115977 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 34.

The square root of 205724275 is about 14343.0915426208. The cubic root of 205724275 is about 590.3304430652.

The spelling of 205724275 in words is "two hundred five million, seven hundred twenty-four thousand, two hundred seventy-five".