205859159 has 4 divisors (see below), whose sum is σ = 224573640. Its totient is φ = 187144680.

The previous prime is 205859153. The next prime is 205859179. The reversal of 205859159 is 951958502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205859159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205859153) 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 in 3 ways as a sum of consecutive naturals, for example, 9357224 + ... + 9357245.

It is an arithmetic number, because the mean of its divisors is an integer number (56143410).

Almost surely, 2^205859159 is an apocalyptic number.

205859159 is a deficient number, since it is larger than the sum of its proper divisors (18714481).

205859159 is a wasteful number, since it uses less digits than its factorization.

205859159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18714480.

The product of its (nonzero) digits is 162000, while the sum is 44.

The square root of 205859159 is about 14347.7928267730. The cubic root of 205859159 is about 590.4594324377.

The spelling of 205859159 in words is "two hundred five million, eight hundred fifty-nine thousand, one hundred fifty-nine".