223544451223 has 4 divisors (see below), whose sum is σ = 226056186720. Its totient is φ = 221032715728.

The previous prime is 223544451209. The next prime is 223544451233. The reversal of 223544451223 is 322154445322.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223544451223 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 (223544451233) 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, 1255867615 + ... + 1255867792.

It is an arithmetic number, because the mean of its divisors is an integer number (56514046680).

Almost surely, 2^223544451223 is an apocalyptic number.

223544451223 is a deficient number, since it is larger than the sum of its proper divisors (2511735497).

223544451223 is an equidigital number, since it uses as much as digits as its factorization.

223544451223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2511735496.

The product of its digits is 230400, while the sum is 37.

Adding to 223544451223 its reverse (322154445322), we get a palindrome (545698896545).

The spelling of 223544451223 in words is "two hundred twenty-three billion, five hundred forty-four million, four hundred fifty-one thousand, two hundred twenty-three".