205825859 has 2 divisors, whose sum is σ = 205825860. Its totient is φ = 205825858.

The previous prime is 205825813. The next prime is 205825913. The reversal of 205825859 is 958528502.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205825859 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (205825159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102912929 + 102912930.

It is an arithmetic number, because the mean of its divisors is an integer number (102912930).

Almost surely, 2^205825859 is an apocalyptic number.

205825859 is a deficient number, since it is larger than the sum of its proper divisors (1).

205825859 is an equidigital number, since it uses as much as digits as its factorization.

205825859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288000, while the sum is 44.

The square root of 205825859 is about 14346.6323226045. The cubic root of 205825859 is about 590.4275929356.

The spelling of 205825859 in words is "two hundred five million, eight hundred twenty-five thousand, eight hundred fifty-nine".