323311221 has 12 divisors (see below), whose sum is σ = 467239500. Its totient is φ = 215432640.

The previous prime is 323311181. The next prime is 323311231. The reversal of 323311221 is 122113323.

It can be written as a sum of positive squares in 2 ways, for example, as 79014321 + 244296900 = 8889^2 + 15630^2 .

It is not a de Polignac number, because 323311221 - 2¹⁵ = 323278453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 323311194 and 323311203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323311231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12655 + ... + 28403.

It is an arithmetic number, because the mean of its divisors is an integer number (38936625).

Almost surely, 2^323311221 is an apocalyptic number.

It is an amenable number.

323311221 is a deficient number, since it is larger than the sum of its proper divisors (143928279).

323311221 is a wasteful number, since it uses less digits than its factorization.

323311221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18036 (or 18033 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 323311221 is about 17980.8570707850. The cubic root of 323311221 is about 686.3414995398.

Adding to 323311221 its reverse (122113323), we get a palindrome (445424544).

The spelling of 323311221 in words is "three hundred twenty-three million, three hundred eleven thousand, two hundred twenty-one".