165115205 has 4 divisors (see below), whose sum is σ = 198138252. Its totient is φ = 132092160.

The previous prime is 165115163. The next prime is 165115219. The reversal of 165115205 is 502511561.

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

It can be written as a sum of positive squares in 2 ways, for example, as 42393121 + 122722084 = 6511^2 + 11078^2 .

It is not a de Polignac number, because 165115205 - 2¹⁴ = 165098821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16511516 + ... + 16511525.

It is an arithmetic number, because the mean of its divisors is an integer number (49534563).

Almost surely, 2^165115205 is an apocalyptic number.

It is an amenable number.

165115205 is a deficient number, since it is larger than the sum of its proper divisors (33023047).

165115205 is an equidigital number, since it uses as much as digits as its factorization.

165115205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33023046.

The product of its (nonzero) digits is 1500, while the sum is 26.

The square root of 165115205 is about 12849.7161447248. The cubic root of 165115205 is about 548.6082774926.

Adding to 165115205 its reverse (502511561), we get a palindrome (667626766).

The spelling of 165115205 in words is "one hundred sixty-five million, one hundred fifteen thousand, two hundred five".