205159 has 4 divisors (see below), whose sum is σ = 206416. Its totient is φ = 203904.

The previous prime is 205157. The next prime is 205171. The reversal of 205159 is 951502.

205159 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 951502 = 2 ⋅475751.

It is a cyclic number.

It is not a de Polignac number, because 205159 - 2¹ = 205157 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 (205151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339 + ... + 724.

It is an arithmetic number, because the mean of its divisors is an integer number (51604).

2²⁰⁵¹⁵⁹ is an apocalyptic number.

205159 is a deficient number, since it is larger than the sum of its proper divisors (1257).

205159 is a wasteful number, since it uses less digits than its factorization.

205159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 205159 is about 452.9448089999. The cubic root of 205159 is about 58.9789257301.

The spelling of 205159 in words is "two hundred five thousand, one hundred fifty-nine".