205251329 has 2 divisors, whose sum is σ = 205251330. Its totient is φ = 205251328.

The previous prime is 205251317. The next prime is 205251367. The reversal of 205251329 is 923152502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175297600 + 29953729 = 13240^2 + 5473^2 .

It is a cyclic number.

It is not a de Polignac number, because 205251329 - 2⁴ = 205251313 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (205251229) 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, 102625664 + 102625665.

It is an arithmetic number, because the mean of its divisors is an integer number (102625665).

Almost surely, 2^205251329 is an apocalyptic number.

It is an amenable number.

205251329 is a deficient number, since it is larger than the sum of its proper divisors (1).

205251329 is an equidigital number, since it uses as much as digits as its factorization.

205251329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 205251329 is about 14326.5951642391. The cubic root of 205251329 is about 589.8777195594.

The spelling of 205251329 in words is "two hundred five million, two hundred fifty-one thousand, three hundred twenty-nine".