205421327 has 2 divisors, whose sum is σ = 205421328. Its totient is φ = 205421326.

The previous prime is 205421311. The next prime is 205421329. The reversal of 205421327 is 723124502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205421327 - 2⁴ = 205421311 is a prime.

Together with 205421329, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 205421296 and 205421305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205421329) 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, 102710663 + 102710664.

It is an arithmetic number, because the mean of its divisors is an integer number (102710664).

Almost surely, 2^205421327 is an apocalyptic number.

205421327 is a deficient number, since it is larger than the sum of its proper divisors (1).

205421327 is an equidigital number, since it uses as much as digits as its factorization.

205421327 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 205421327 is about 14332.5268881660. The cubic root of 205421327 is about 590.0405286724.

Adding to 205421327 its reverse (723124502), we get a palindrome (928545829).

The spelling of 205421327 in words is "two hundred five million, four hundred twenty-one thousand, three hundred twenty-seven".