181223 has 4 divisors (see below), whose sum is σ = 207120. Its totient is φ = 155328.

The previous prime is 181219. The next prime is 181243. The reversal of 181223 is 322181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322181 = 199 ⋅1619.

It is a cyclic number.

It is not a de Polignac number, because 181223 - 2² = 181219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12938 + ... + 12951.

It is an arithmetic number, because the mean of its divisors is an integer number (51780).

2¹⁸¹²²³ is an apocalyptic number.

181223 is a deficient number, since it is larger than the sum of its proper divisors (25897).

181223 is an equidigital number, since it uses as much as digits as its factorization.

181223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25896.

The product of its digits is 96, while the sum is 17.

The square root of 181223 is about 425.7029480753. The cubic root of 181223 is about 56.5897495453.

It can be divided in two parts, 181 and 223, that added together give a palindrome (404).

The spelling of 181223 in words is "one hundred eighty-one thousand, two hundred twenty-three".