205570245 has 32 divisors (see below), whose sum is σ = 340254720. Its totient is φ = 105917760.

The previous prime is 205570237. The next prime is 205570259. The reversal of 205570245 is 542075502.

It is not a de Polignac number, because 205570245 - 2³ = 205570237 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53850 + ... + 57540.

It is an arithmetic number, because the mean of its divisors is an integer number (10632960).

Almost surely, 2^205570245 is an apocalyptic number.

It is an amenable number.

205570245 is a deficient number, since it is larger than the sum of its proper divisors (134684475).

205570245 is a wasteful number, since it uses less digits than its factorization.

205570245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3825.

The product of its (nonzero) digits is 14000, while the sum is 30.

The square root of 205570245 is about 14337.7210532218. The cubic root of 205570245 is about 590.1830754280.

The spelling of 205570245 in words is "two hundred five million, five hundred seventy thousand, two hundred forty-five".