23131223 has 4 divisors (see below), whose sum is σ = 23148840. Its totient is φ = 23113608.

The previous prime is 23131211. The next prime is 23131231. The reversal of 23131223 is 32213132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23131223 - 2¹⁶ = 23065687 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 (23131523) by changing a digit.

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, 6665 + ... + 9522.

It is an arithmetic number, because the mean of its divisors is an integer number (5787210).

Almost surely, 2^23131223 is an apocalyptic number.

23131223 is a deficient number, since it is larger than the sum of its proper divisors (17617).

23131223 is a wasteful number, since it uses less digits than its factorization.

23131223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17616.

The product of its digits is 216, while the sum is 17.

The square root of 23131223 is about 4809.4930086237. The cubic root of 23131223 is about 284.9265143461.

Adding to 23131223 its reverse (32213132), we get a palindrome (55344355).

The spelling of 23131223 in words is "twenty-three million, one hundred thirty-one thousand, two hundred twenty-three".