205056559 has 2 divisors, whose sum is σ = 205056560. Its totient is φ = 205056558.

The previous prime is 205056557. The next prime is 205056581. The reversal of 205056559 is 955650502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205056559 - 2¹ = 205056557 is a prime.

Together with 205056557, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205056557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102528279 + 102528280.

It is an arithmetic number, because the mean of its divisors is an integer number (102528280).

Almost surely, 2^205056559 is an apocalyptic number.

205056559 is a deficient number, since it is larger than the sum of its proper divisors (1).

205056559 is an equidigital number, since it uses as much as digits as its factorization.

205056559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67500, while the sum is 37.

The square root of 205056559 is about 14319.7960530170. The cubic root of 205056559 is about 589.6910754674.

It can be divided in two parts, 2050565 and 59, that added together give a square (2050624 = 1432²).

The spelling of 205056559 in words is "two hundred five million, fifty-six thousand, five hundred fifty-nine".