205500263 has 2 divisors, whose sum is σ = 205500264. Its totient is φ = 205500262.

The previous prime is 205500187. The next prime is 205500307. The reversal of 205500263 is 362005502.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205500263 - 2⁸ = 205500007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205500563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102750131 + 102750132.

It is an arithmetic number, because the mean of its divisors is an integer number (102750132).

Almost surely, 2^205500263 is an apocalyptic number.

205500263 is a deficient number, since it is larger than the sum of its proper divisors (1).

205500263 is an equidigital number, since it uses as much as digits as its factorization.

205500263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 205500263 is about 14335.2803600069. The cubic root of 205500263 is about 590.1160960853.

Adding to 205500263 its reverse (362005502), we get a palindrome (567505765).

The spelling of 205500263 in words is "two hundred five million, five hundred thousand, two hundred sixty-three".