205251259 has 2 divisors, whose sum is σ = 205251260. Its totient is φ = 205251258.

The previous prime is 205251239. The next prime is 205251269. The reversal of 205251259 is 952152502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205251259 - 2⁵ = 205251227 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205251259.

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 (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102625629 + 102625630.

It is an arithmetic number, because the mean of its divisors is an integer number (102625630).

Almost surely, 2^205251259 is an apocalyptic number.

205251259 is a deficient number, since it is larger than the sum of its proper divisors (1).

205251259 is an equidigital number, since it uses as much as digits as its factorization.

205251259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 205251259 is about 14326.5927212300. The cubic root of 205251259 is about 589.8776525011.

The spelling of 205251259 in words is "two hundred five million, two hundred fifty-one thousand, two hundred fifty-nine".