205055243 has 4 divisors (see below), whose sum is σ = 205390368. Its totient is φ = 204720120.

The previous prime is 205055233. The next prime is 205055287. The reversal of 205055243 is 342550502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 205055243 - 2¹⁰ = 205054219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205055233) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 166643 + ... + 167868.

It is an arithmetic number, because the mean of its divisors is an integer number (51347592).

Almost surely, 2^205055243 is an apocalyptic number.

205055243 is a deficient number, since it is larger than the sum of its proper divisors (335125).

205055243 is an equidigital number, since it uses as much as digits as its factorization.

205055243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335124.

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 205055243 is about 14319.7501025681. The cubic root of 205055243 is about 589.6898139698.

The spelling of 205055243 in words is "two hundred five million, fifty-five thousand, two hundred forty-three".