423303021 has 12 divisors (see below), whose sum is σ = 617153472. Its totient is φ = 279563976.

The previous prime is 423302989. The next prime is 423303029. The reversal of 423303021 is 120303324.

It is not a de Polignac number, because 423303021 - 2⁵ = 423302989 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 423302985 and 423303003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423303029) 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 11 ways as a sum of consecutive naturals, for example, 218821 + ... + 220746.

It is an arithmetic number, because the mean of its divisors is an integer number (51429456).

Almost surely, 2^423303021 is an apocalyptic number.

It is an amenable number.

423303021 is a deficient number, since it is larger than the sum of its proper divisors (193850451).

423303021 is a wasteful number, since it uses less digits than its factorization.

423303021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439680 (or 439677 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 423303021 is about 20574.3291749695. The cubic root of 423303021 is about 750.8452816407.

Adding to 423303021 its reverse (120303324), we get a palindrome (543606345).

The spelling of 423303021 in words is "four hundred twenty-three million, three hundred three thousand, twenty-one".