165115 has 4 divisors (see below), whose sum is σ = 198144. Its totient is φ = 132088.

The previous prime is 165103. The next prime is 165133. The reversal of 165115 is 511561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 511561 = 173 ⋅2957.

It is a cyclic number.

It is not a de Polignac number, because 165115 - 2⁵ = 165083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165092 and 165101.

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, 16507 + ... + 16516.

It is an arithmetic number, because the mean of its divisors is an integer number (49536).

2¹⁶⁵¹¹⁵ is an apocalyptic number.

165115 is a deficient number, since it is larger than the sum of its proper divisors (33029).

165115 is an equidigital number, since it uses as much as digits as its factorization.

165115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33028.

The product of its digits is 150, while the sum is 19.

The square root of 165115 is about 406.3434507901. The cubic root of 165115 is about 54.8608050450.

Adding to 165115 its reverse (511561), we get a palindrome (676676).

The spelling of 165115 in words is "one hundred sixty-five thousand, one hundred fifteen".