323421221 has 4 divisors (see below), whose sum is σ = 323544012. Its totient is φ = 323298432.

The previous prime is 323421199. The next prime is 323421227. The reversal of 323421221 is 122124323.

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 63760225 + 259660996 = 7985^2 + 16114^2 .

It is a cyclic number.

It is not a de Polignac number, because 323421221 - 2²² = 319226917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 323421193 and 323421202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323421227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57356 + ... + 62741.

It is an arithmetic number, because the mean of its divisors is an integer number (80886003).

Almost surely, 2^323421221 is an apocalyptic number.

It is an amenable number.

323421221 is a deficient number, since it is larger than the sum of its proper divisors (122791).

323421221 is a wasteful number, since it uses less digits than its factorization.

323421221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122790.

The product of its digits is 576, while the sum is 20.

The square root of 323421221 is about 17983.9156192415. The cubic root of 323421221 is about 686.4193285783.

Adding to 323421221 its reverse (122124323), we get a palindrome (445545544).

The spelling of 323421221 in words is "three hundred twenty-three million, four hundred twenty-one thousand, two hundred twenty-one".