423424221 has 32 divisors (see below), whose sum is σ = 625121280. Its totient is φ = 252806400.

The previous prime is 423424213. The next prime is 423424229. The reversal of 423424221 is 122424324.

It is an interprime number because it is at equal distance from previous prime (423424213) and next prime (423424229).

It is not a de Polignac number, because 423424221 - 2³ = 423424213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 423424191 and 423424200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423424229) 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 31 ways as a sum of consecutive naturals, for example, 1010350 + ... + 1010768.

It is an arithmetic number, because the mean of its divisors is an integer number (19535040).

Almost surely, 2^423424221 is an apocalyptic number.

It is an amenable number.

423424221 is a deficient number, since it is larger than the sum of its proper divisors (201697059).

423424221 is a wasteful number, since it uses less digits than its factorization.

423424221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817.

The product of its digits is 3072, while the sum is 24.

The square root of 423424221 is about 20577.2743821916. The cubic root of 423424221 is about 750.9169354047.

Adding to 423424221 its reverse (122424324), we get a palindrome (545848545).

The spelling of 423424221 in words is "four hundred twenty-three million, four hundred twenty-four thousand, two hundred twenty-one".