423221331 has 32 divisors (see below), whose sum is σ = 648990720. Its totient is φ = 243331200.

The previous prime is 423221327. The next prime is 423221347. The reversal of 423221331 is 133122324.

It is not a de Polignac number, because 423221331 - 2² = 423221327 is a prime.

It is a super-2 number, since 2×423221331² = 358232590026823122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 423221298 and 423221307.

It is not an unprimeable number, because it can be changed into a prime (423220331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29026 + ... + 41096.

It is an arithmetic number, because the mean of its divisors is an integer number (20280960).

Almost surely, 2^423221331 is an apocalyptic number.

423221331 is a deficient number, since it is larger than the sum of its proper divisors (225769389).

423221331 is a wasteful number, since it uses less digits than its factorization.

423221331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12147.

The product of its digits is 864, while the sum is 21.

The square root of 423221331 is about 20572.3438382699. The cubic root of 423221331 is about 750.7969785780.

Adding to 423221331 its reverse (133122324), we get a palindrome (556343655).

The spelling of 423221331 in words is "four hundred twenty-three million, two hundred twenty-one thousand, three hundred thirty-one".