423243221 has 8 divisors (see below), whose sum is σ = 452170080. Its totient is φ = 394981488.

The previous prime is 423243181. The next prime is 423243229. The reversal of 423243221 is 122342324.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 423243221 - 2⁶ = 423243157 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 (423243229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164966 + ... + 167511.

It is an arithmetic number, because the mean of its divisors is an integer number (56521260).

Almost surely, 2^423243221 is an apocalyptic number.

It is an amenable number.

423243221 is a deficient number, since it is larger than the sum of its proper divisors (28926859).

423243221 is a wasteful number, since it uses less digits than its factorization.

423243221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332563.

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

The square root of 423243221 is about 20572.8758563308. The cubic root of 423243221 is about 750.8099226818.

Adding to 423243221 its reverse (122342324), we get a palindrome (545585545).

The spelling of 423243221 in words is "four hundred twenty-three million, two hundred forty-three thousand, two hundred twenty-one".