205830925 has 18 divisors (see below), whose sum is σ = 257982558. Its totient is φ = 162901440.

The previous prime is 205830899. The next prime is 205830931. The reversal of 205830925 is 529038502.

It can be written as a sum of positive squares in 9 ways, for example, as 2996361 + 202834564 = 1731^2 + 14242^2 .

It is not a de Polignac number, because 205830925 - 2⁷ = 205830797 is a prime.

It is a Duffinian number.

It is a congruent number.

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 17 ways as a sum of consecutive naturals, for example, 898711 + ... + 898939.

Almost surely, 2^205830925 is an apocalyptic number.

205830925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205830925 is a deficient number, since it is larger than the sum of its proper divisors (52151633).

205830925 is an equidigital number, since it uses as much as digits as its factorization.

205830925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 205830925 is about 14346.8088786322. The cubic root of 205830925 is about 590.4324369684.

The spelling of 205830925 in words is "two hundred five million, eight hundred thirty thousand, nine hundred twenty-five".