205511041 has 2 divisors, whose sum is σ = 205511042. Its totient is φ = 205511040.

The previous prime is 205511039. The next prime is 205511069. The reversal of 205511041 is 140115502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203661441 + 1849600 = 14271^2 + 1360^2 .

It is a cyclic number.

It is not a de Polignac number, because 205511041 - 2¹ = 205511039 is a prime.

Together with 205511039, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (205511641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102755520 + 102755521.

It is an arithmetic number, because the mean of its divisors is an integer number (102755521).

Almost surely, 2^205511041 is an apocalyptic number.

It is an amenable number.

205511041 is a deficient number, since it is larger than the sum of its proper divisors (1).

205511041 is an equidigital number, since it uses as much as digits as its factorization.

205511041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 205511041 is about 14335.6562807567. The cubic root of 205511041 is about 590.1264126334.

Adding to 205511041 its reverse (140115502), we get a palindrome (345626543).

The spelling of 205511041 in words is "two hundred five million, five hundred eleven thousand, forty-one".