165223 has 4 divisors (see below), whose sum is σ = 174960. Its totient is φ = 155488.

The previous prime is 165211. The next prime is 165229. The reversal of 165223 is 322561.

It is a happy number.

165223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322561 = 47 ⋅6863.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165223 is a prime.

It is a d-powerful number, because it can be written as 1 + 6⁴ + 2¹⁵ + 5 + 2¹⁷ + 3⁴ .

It is a Duffinian number.

165223 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 165223.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 4843 + ... + 4876.

It is an arithmetic number, because the mean of its divisors is an integer number (43740).

2¹⁶⁵²²³ is an apocalyptic number.

165223 is a deficient number, since it is larger than the sum of its proper divisors (9737).

165223 is an equidigital number, since it uses as much as digits as its factorization.

165223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9736.

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

The square root of 165223 is about 406.4763215736. The cubic root of 165223 is about 54.8727637315.

Adding to 165223 its reverse (322561), we get a palindrome (487784).

The spelling of 165223 in words is "one hundred sixty-five thousand, two hundred twenty-three".