423144223 has 4 divisors (see below), whose sum is σ = 423985968. Its totient is φ = 422302480.

The previous prime is 423144199. The next prime is 423144299. The reversal of 423144223 is 322441324.

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-423144223 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 (423144023) 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, 420118 + ... + 421123.

It is an arithmetic number, because the mean of its divisors is an integer number (105996492).

Almost surely, 2^423144223 is an apocalyptic number.

423144223 is a deficient number, since it is larger than the sum of its proper divisors (841745).

423144223 is an equidigital number, since it uses as much as digits as its factorization.

423144223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841744.

The product of its digits is 4608, while the sum is 25.

The square root of 423144223 is about 20570.4696835050. The cubic root of 423144223 is about 750.7513791360.

Adding to 423144223 its reverse (322441324), we get a palindrome (745585547).

The spelling of 423144223 in words is "four hundred twenty-three million, one hundred forty-four thousand, two hundred twenty-three".