205540327 has 2 divisors, whose sum is σ = 205540328. Its totient is φ = 205540326.

The previous prime is 205540303. The next prime is 205540331. The reversal of 205540327 is 723045502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205540327 - 2²³ = 197151719 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 205540295 and 205540304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205540367) 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, 102770163 + 102770164.

It is an arithmetic number, because the mean of its divisors is an integer number (102770164).

Almost surely, 2^205540327 is an apocalyptic number.

205540327 is a deficient number, since it is larger than the sum of its proper divisors (1).

205540327 is an equidigital number, since it uses as much as digits as its factorization.

205540327 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 205540327 is about 14336.6776834802. The cubic root of 205540327 is about 590.1544429543.

Adding to 205540327 its reverse (723045502), we get a palindrome (928585829).

The spelling of 205540327 in words is "two hundred five million, five hundred forty thousand, three hundred twenty-seven".