205136 has 10 divisors (see below), whose sum is σ = 397482. Its totient is φ = 102560.

The previous prime is 205133. The next prime is 205141. The reversal of 205136 is 631502.

It can be written as a sum of positive squares in only one way, i.e., 126736 + 78400 = 356^2 + 280^2 .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 205136.

It is not an unprimeable number, because it can be changed into a prime (205133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6395 + ... + 6426.

2²⁰⁵¹³⁶ is an apocalyptic number.

It is an amenable number.

205136 is a deficient number, since it is larger than the sum of its proper divisors (192346).

205136 is a wasteful number, since it uses less digits than its factorization.

205136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12829 (or 12823 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 205136 is about 452.9194188815. The cubic root of 205136 is about 58.9767216412.

Adding to 205136 its reverse (631502), we get a palindrome (836638).

The spelling of 205136 in words is "two hundred five thousand, one hundred thirty-six".