423234221 has 4 divisors (see below), whose sum is σ = 423863772. Its totient is φ = 422604672.

The previous prime is 423234211. The next prime is 423234241. The reversal of 423234221 is 122432324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 194044900 + 229189321 = 13930^2 + 15139^2 .

It is a cyclic number.

It is not a de Polignac number, because 423234221 - 2¹⁰ = 423233197 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 (423234211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313766 + ... + 315111.

It is an arithmetic number, because the mean of its divisors is an integer number (105965943).

Almost surely, 2^423234221 is an apocalyptic number.

It is an amenable number.

423234221 is a deficient number, since it is larger than the sum of its proper divisors (629551).

423234221 is an equidigital number, since it uses as much as digits as its factorization.

423234221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629550.

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

The square root of 423234221 is about 20572.6571205569. The cubic root of 423234221 is about 750.8046008110.

Adding to 423234221 its reverse (122432324), we get a palindrome (545666545).

The spelling of 423234221 in words is "four hundred twenty-three million, two hundred thirty-four thousand, two hundred twenty-one".