205120165 has 16 divisors (see below), whose sum is σ = 250822080. Its totient is φ = 160997760.

The previous prime is 205120163. The next prime is 205120183. The reversal of 205120165 is 561021502.

205120165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 205120165 - 2¹ = 205120163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205120163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93046 + ... + 95224.

It is an arithmetic number, because the mean of its divisors is an integer number (15676380).

Almost surely, 2^205120165 is an apocalyptic number.

It is an amenable number.

205120165 is a deficient number, since it is larger than the sum of its proper divisors (45701915).

205120165 is a wasteful number, since it uses less digits than its factorization.

205120165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 205120165 is about 14322.0167923376. The cubic root of 205120165 is about 589.7520407823.

Adding to 205120165 its reverse (561021502), we get a palindrome (766141667).

The spelling of 205120165 in words is "two hundred five million, one hundred twenty thousand, one hundred sixty-five".