331222321 has 4 divisors (see below), whose sum is σ = 341906944. Its totient is φ = 320537700.

The previous prime is 331222319. The next prime is 331222327. The reversal of 331222321 is 123222133.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 331222321 - 2¹ = 331222319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331222327) 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, 5342265 + ... + 5342326.

It is an arithmetic number, because the mean of its divisors is an integer number (85476736).

Almost surely, 2^331222321 is an apocalyptic number.

331222321 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

331222321 is a deficient number, since it is larger than the sum of its proper divisors (10684623).

331222321 is a wasteful number, since it uses less digits than its factorization.

331222321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10684622.

The product of its digits is 432, while the sum is 19.

The square root of 331222321 is about 18199.5143067061. The cubic root of 331222321 is about 691.8944793551.

Adding to 331222321 its reverse (123222133), we get a palindrome (454444454).

The spelling of 331222321 in words is "three hundred thirty-one million, two hundred twenty-two thousand, three hundred twenty-one".