331444321 has 12 divisors (see below), whose sum is σ = 359488128. Its totient is φ = 305448624.

The previous prime is 331444313. The next prime is 331444331. The reversal of 331444321 is 123444133.

It is not a de Polignac number, because 331444321 - 2³ = 331444313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331444331) 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, 137896 + ... + 140278.

It is an arithmetic number, because the mean of its divisors is an integer number (29957344).

Almost surely, 2^331444321 is an apocalyptic number.

It is an amenable number.

331444321 is a deficient number, since it is larger than the sum of its proper divisors (28043807).

331444321 is a wasteful number, since it uses less digits than its factorization.

331444321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232 (or 3219 counting only the distinct ones).

The product of its digits is 3456, while the sum is 25.

The square root of 331444321 is about 18205.6123489434. The cubic root of 331444321 is about 692.0490243649.

Adding to 331444321 its reverse (123444133), we get a palindrome (454888454).

The spelling of 331444321 in words is "three hundred thirty-one million, four hundred forty-four thousand, three hundred twenty-one".