205012163 has 16 divisors (see below), whose sum is σ = 220216320. Its totient is φ = 190181376.

The previous prime is 205012141. The next prime is 205012217. The reversal of 205012163 is 361210502.

It is a cyclic number.

It is not a de Polignac number, because 205012163 - 2⁸ = 205011907 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (205012063) 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 15 ways as a sum of consecutive naturals, for example, 580595 + ... + 580947.

It is an arithmetic number, because the mean of its divisors is an integer number (13763520).

Almost surely, 2^205012163 is an apocalyptic number.

205012163 is a deficient number, since it is larger than the sum of its proper divisors (15204157).

205012163 is a wasteful number, since it uses less digits than its factorization.

205012163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 205012163 is about 14318.2458073606. The cubic root of 205012163 is about 589.6485151535.

Adding to 205012163 its reverse (361210502), we get a palindrome (566222665).

The spelling of 205012163 in words is "two hundred five million, twelve thousand, one hundred sixty-three".