423232421 has 4 divisors (see below), whose sum is σ = 423361344. Its totient is φ = 423103500.

The previous prime is 423232379. The next prime is 423232427. The reversal of 423232421 is 124232324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 423232421 - 2¹⁸ = 422970277 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 (423232427) 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, 59405 + ... + 66146.

It is an arithmetic number, because the mean of its divisors is an integer number (105840336).

Almost surely, 2^423232421 is an apocalyptic number.

It is an amenable number.

423232421 is a deficient number, since it is larger than the sum of its proper divisors (128923).

423232421 is a wasteful number, since it uses less digits than its factorization.

423232421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128922.

The product of its digits is 2304, while the sum is 23.

The square root of 423232421 is about 20572.6133731230. The cubic root of 423232421 is about 750.8035364278.

Adding to 423232421 its reverse (124232324), we get a palindrome (547464745).

It can be divided in two parts, 42323 and 2421, that added together give a palindrome (44744).

The spelling of 423232421 in words is "four hundred twenty-three million, two hundred thirty-two thousand, four hundred twenty-one".