331320216 has 16 divisors (see below), whose sum is σ = 828300600. Its totient is φ = 110440064.

The previous prime is 331320193. The next prime is 331320217. The reversal of 331320216 is 612023133.

It is a junction number, because it is equal to n+sod(n) for n = 331320192 and 331320201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331320217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6902481 + ... + 6902528.

Almost surely, 2^331320216 is an apocalyptic number.

It is an amenable number.

331320216 is an abundant number, since it is smaller than the sum of its proper divisors (496980384).

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

331320216 is a wasteful number, since it uses less digits than its factorization.

331320216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13805018 (or 13805014 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 331320216 is about 18202.2036028608. The cubic root of 331320216 is about 691.9626373403.

Adding to 331320216 its reverse (612023133), we get a palindrome (943343349).

The spelling of 331320216 in words is "three hundred thirty-one million, three hundred twenty thousand, two hundred sixteen".