161223 has 8 divisors (see below), whose sum is σ = 218736. Its totient is φ = 105600.

The previous prime is 161221. The next prime is 161233. The reversal of 161223 is 322161.

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

It is not a de Polignac number, because 161223 - 2¹ = 161221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161221) 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 7 ways as a sum of consecutive naturals, for example, 258 + ... + 623.

It is an arithmetic number, because the mean of its divisors is an integer number (27342).

2¹⁶¹²²³ is an apocalyptic number.

161223 is a deficient number, since it is larger than the sum of its proper divisors (57513).

161223 is an equidigital number, since it uses as much as digits as its factorization.

161223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945.

The product of its digits is 72, while the sum is 15.

The square root of 161223 is about 401.5258397663. The cubic root of 161223 is about 54.4263235852.

Adding to 161223 its reverse (322161), we get a palindrome (483384).

The spelling of 161223 in words is "one hundred sixty-one thousand, two hundred twenty-three".