205852857 has 16 divisors (see below), whose sum is σ = 318824832. Its totient is φ = 115701120.

The previous prime is 205852849. The next prime is 205852879. The reversal of 205852857 is 758258502.

It is not a de Polignac number, because 205852857 - 2³ = 205852849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205852957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79068 + ... + 81629.

It is an arithmetic number, because the mean of its divisors is an integer number (19926552).

Almost surely, 2^205852857 is an apocalyptic number.

It is an amenable number.

205852857 is a deficient number, since it is larger than the sum of its proper divisors (112971975).

205852857 is a wasteful number, since it uses less digits than its factorization.

205852857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160768.

The product of its (nonzero) digits is 224000, while the sum is 42.

The square root of 205852857 is about 14347.5732094316. The cubic root of 205852857 is about 590.4534070992.

The spelling of 205852857 in words is "two hundred five million, eight hundred fifty-two thousand, eight hundred fifty-seven".