205135201 has 2 divisors, whose sum is σ = 205135202. Its totient is φ = 205135200.

The previous prime is 205135193. The next prime is 205135207. The reversal of 205135201 is 102531502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173606976 + 31528225 = 13176^2 + 5615^2 .

It is a cyclic number.

It is not a de Polignac number, because 205135201 - 2³ = 205135193 is a prime.

It is not a weakly prime, because it can be changed into another prime (205135207) 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 as a sum of consecutive naturals, namely, 102567600 + 102567601.

It is an arithmetic number, because the mean of its divisors is an integer number (102567601).

Almost surely, 2^205135201 is an apocalyptic number.

It is an amenable number.

205135201 is a deficient number, since it is larger than the sum of its proper divisors (1).

205135201 is an equidigital number, since it uses as much as digits as its factorization.

205135201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 205135201 is about 14322.5417087890. The cubic root of 205135201 is about 589.7664507015.

Adding to 205135201 its reverse (102531502), we get a palindrome (307666703).

The spelling of 205135201 in words is "two hundred five million, one hundred thirty-five thousand, two hundred one".