323144221 has 2 divisors, whose sum is σ = 323144222. Its totient is φ = 323144220.

The previous prime is 323144203. The next prime is 323144231. The reversal of 323144221 is 122441323.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 285136996 + 38007225 = 16886^2 + 6165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-323144221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 323144192 and 323144201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (323144201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161572110 + 161572111.

It is an arithmetic number, because the mean of its divisors is an integer number (161572111).

Almost surely, 2^323144221 is an apocalyptic number.

It is an amenable number.

323144221 is a deficient number, since it is larger than the sum of its proper divisors (1).

323144221 is an equidigital number, since it uses as much as digits as its factorization.

323144221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 22.

The square root of 323144221 is about 17976.2126433796. The cubic root of 323144221 is about 686.2233071569.

Adding to 323144221 its reverse (122441323), we get a palindrome (445585544).

The spelling of 323144221 in words is "three hundred twenty-three million, one hundred forty-four thousand, two hundred twenty-one".