165225 has 12 divisors (see below), whose sum is σ = 273296. Its totient is φ = 88080.

The previous prime is 165211. The next prime is 165229. The reversal of 165225 is 522561.

It is not a de Polignac number, because 165225 - 2⁶ = 165161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1027 + ... + 1176.

2¹⁶⁵²²⁵ is an apocalyptic number.

165225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165225 is a deficient number, since it is larger than the sum of its proper divisors (108071).

165225 is a wasteful number, since it uses less digits than its factorization.

165225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216 (or 2211 counting only the distinct ones).

The product of its digits is 600, while the sum is 21.

The square root of 165225 is about 406.4787817341. The cubic root of 165225 is about 54.8729851395.

Adding to 165225 its reverse (522561), we get a palindrome (687786).

The spelling of 165225 in words is "one hundred sixty-five thousand, two hundred twenty-five".