223165 has 4 divisors (see below), whose sum is σ = 267804. Its totient is φ = 178528.

The previous prime is 223151. The next prime is 223207. The reversal of 223165 is 561322.

It is a happy number.

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 143641 + 79524 = 379^2 + 282^2 .

It is a cyclic number.

It is not a de Polignac number, because 223165 - 2⁵ = 223133 is a prime.

It is a super-3 number, since 3×223165³ = 33342603219051375, which contains 333 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22312 + ... + 22321.

It is an arithmetic number, because the mean of its divisors is an integer number (66951).

2²²³¹⁶⁵ is an apocalyptic number.

It is an amenable number.

223165 is a deficient number, since it is larger than the sum of its proper divisors (44639).

223165 is an equidigital number, since it uses as much as digits as its factorization.

223165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44638.

The product of its digits is 360, while the sum is 19.

The square root of 223165 is about 472.4034292848. The cubic root of 223165 is about 60.6562226248.

Adding to 223165 its reverse (561322), we get a palindrome (784487).

The spelling of 223165 in words is "two hundred twenty-three thousand, one hundred sixty-five".