205255481 has 2 divisors, whose sum is σ = 205255482. Its totient is φ = 205255480.

The previous prime is 205255447. The next prime is 205255511. The reversal of 205255481 is 184552502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195552256 + 9703225 = 13984^2 + 3115^2 .

It is a cyclic number.

It is not a de Polignac number, because 205255481 - 2²² = 201061177 is a prime.

It is a super-2 number, since 2×205255481² = 84259624961082722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (205255441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102627740 + 102627741.

It is an arithmetic number, because the mean of its divisors is an integer number (102627741).

Almost surely, 2^205255481 is an apocalyptic number.

It is an amenable number.

205255481 is a deficient number, since it is larger than the sum of its proper divisors (1).

205255481 is an equidigital number, since it uses as much as digits as its factorization.

205255481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16000, while the sum is 32.

The square root of 205255481 is about 14326.7400688363. The cubic root of 205255481 is about 589.8816970501.

The spelling of 205255481 in words is "two hundred five million, two hundred fifty-five thousand, four hundred eighty-one".