331223320 has 16 divisors (see below), whose sum is σ = 745252560. Its totient is φ = 132489312.

The previous prime is 331223311. The next prime is 331223329. The reversal of 331223320 is 23322133.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (331223311) and next prime (331223329).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331223329) 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 in 3 ways as a sum of consecutive naturals, for example, 4140252 + ... + 4140331.

It is an arithmetic number, because the mean of its divisors is an integer number (46578285).

Almost surely, 2^331223320 is an apocalyptic number.

It is an amenable number.

331223320 is an abundant number, since it is smaller than the sum of its proper divisors (414029240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

331223320 is a wasteful number, since it uses less digits than its factorization.

331223320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8280594 (or 8280590 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 331223320 is about 18199.5417524728. The cubic root of 331223320 is about 691.8951749623.

Adding to 331223320 its reverse (23322133), we get a palindrome (354545453).

The spelling of 331223320 in words is "three hundred thirty-one million, two hundred twenty-three thousand, three hundred twenty".