165240205 has 16 divisors (see below), whose sum is σ = 213857280. Its totient is φ = 121843008.

The previous prime is 165240197. The next prime is 165240223. The reversal of 165240205 is 502042561.

It is a cyclic number.

It is not a de Polignac number, because 165240205 - 2³ = 165240197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165240205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55956 + ... + 58834.

It is an arithmetic number, because the mean of its divisors is an integer number (13366080).

Almost surely, 2^165240205 is an apocalyptic number.

It is an amenable number.

165240205 is a deficient number, since it is larger than the sum of its proper divisors (48617075).

165240205 is a wasteful number, since it uses less digits than its factorization.

165240205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3780.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 165240205 is about 12854.5791451918. The cubic root of 165240205 is about 548.7466833547.

Adding to 165240205 its reverse (502042561), we get a palindrome (667282766).

The spelling of 165240205 in words is "one hundred sixty-five million, two hundred forty thousand, two hundred five".