323312021 has 2 divisors, whose sum is σ = 323312022. Its totient is φ = 323312020.

The previous prime is 323311979. The next prime is 323312053. The reversal of 323312021 is 120213323.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 236728996 + 86583025 = 15386^2 + 9305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-323312021 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (323312221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161656010 + 161656011.

It is an arithmetic number, because the mean of its divisors is an integer number (161656011).

Almost surely, 2^323312021 is an apocalyptic number.

It is an amenable number.

323312021 is a deficient number, since it is larger than the sum of its proper divisors (1).

323312021 is an equidigital number, since it uses as much as digits as its factorization.

323312021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 323312021 is about 17980.8793166519. The cubic root of 323312021 is about 686.3420656328.

Adding to 323312021 its reverse (120213323), we get a palindrome (443525344).

The spelling of 323312021 in words is "three hundred twenty-three million, three hundred twelve thousand, twenty-one".