423212443 has 4 divisors (see below), whose sum is σ = 441613008. Its totient is φ = 404811880.

The previous prime is 423212411. The next prime is 423212509. The reversal of 423212443 is 344212324.

It is a happy number.

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 423212443 - 2⁵ = 423212411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423252443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9200248 + ... + 9200293.

It is an arithmetic number, because the mean of its divisors is an integer number (110403252).

Almost surely, 2^423212443 is an apocalyptic number.

423212443 is a deficient number, since it is larger than the sum of its proper divisors (18400565).

423212443 is a wasteful number, since it uses less digits than its factorization.

423212443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18400564.

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

The square root of 423212443 is about 20572.1278189690. The cubic root of 423212443 is about 750.7917227542.

Adding to 423212443 its reverse (344212324), we get a palindrome (767424767).

The spelling of 423212443 in words is "four hundred twenty-three million, two hundred twelve thousand, four hundred forty-three".