205535249 has 2 divisors, whose sum is σ = 205535250. Its totient is φ = 205535248.

The previous prime is 205535203. The next prime is 205535251. The reversal of 205535249 is 942535502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183115024 + 22420225 = 13532^2 + 4735^2 .

It is a cyclic number.

It is not a de Polignac number, because 205535249 - 2⁸ = 205534993 is a prime.

Together with 205535251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (205535299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102767624 + 102767625.

It is an arithmetic number, because the mean of its divisors is an integer number (102767625).

Almost surely, 2^205535249 is an apocalyptic number.

It is an amenable number.

205535249 is a deficient number, since it is larger than the sum of its proper divisors (1).

205535249 is an equidigital number, since it uses as much as digits as its factorization.

205535249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 205535249 is about 14336.5005841733. The cubic root of 205535249 is about 590.1495828716.

The spelling of 205535249 in words is "two hundred five million, five hundred thirty-five thousand, two hundred forty-nine".