23165 has 8 divisors (see below), whose sum is σ = 28728. Its totient is φ = 17920.

The previous prime is 23159. The next prime is 23167. The reversal of 23165 is 56132.

It can be written as a sum of positive squares in 4 ways, for example, as 1849 + 21316 = 43^2 + 146^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23165 - 2¹² = 19069 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149 + ... + 261.

It is an arithmetic number, because the mean of its divisors is an integer number (3591).

2²³¹⁶⁵ is an apocalyptic number.

It is an amenable number.

23165 is a deficient number, since it is larger than the sum of its proper divisors (5563).

23165 is a wasteful number, since it uses less digits than its factorization.

23165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159.

The product of its digits is 180, while the sum is 17.

The square root of 23165 is about 152.2005256233. The cubic root of 23165 is about 28.5065133364.

Adding to 23165 its reverse (56132), we get a palindrome (79297).

The spelling of 23165 in words is "twenty-three thousand, one hundred sixty-five".