206057 has 12 divisors (see below), whose sum is σ = 235776. Its totient is φ = 179520.

The previous prime is 206051. The next prime is 206069. The reversal of 206057 is 750602.

206057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 206057 - 2⁶ = 205993 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 206057.

It is not an unprimeable number, because it can be changed into a prime (206051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6632 + ... + 6662.

It is an arithmetic number, because the mean of its divisors is an integer number (19648).

2²⁰⁶⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

206057 is a deficient number, since it is larger than the sum of its proper divisors (29719).

206057 is a wasteful number, since it uses less digits than its factorization.

206057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 206057 is about 453.9350173758. The cubic root of 206057 is about 59.0648525607.

Adding to 206057 its reverse (750602), we get a palindrome (956659).

The spelling of 206057 in words is "two hundred six thousand, fifty-seven".