331320220 has 48 divisors (see below), whose sum is σ = 867460608. Its totient is φ = 103268160.

The previous prime is 331320217. The next prime is 331320277. The reversal of 331320220 is 22023133.

It is a junction number, because it is equal to n+sod(n) for n = 331320194 and 331320203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106032 + ... + 109111.

It is an arithmetic number, because the mean of its divisors is an integer number (18072096).

Almost surely, 2^331320220 is an apocalyptic number.

It is an amenable number.

331320220 is an abundant number, since it is smaller than the sum of its proper divisors (536140388).

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

331320220 is a wasteful number, since it uses less digits than its factorization.

331320220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215170 (or 215168 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 331320220 is about 18202.2037127376. The cubic root of 331320220 is about 691.9626401250.

Adding to 331320220 its reverse (22023133), we get a palindrome (353343353).

The spelling of 331320220 in words is "three hundred thirty-one million, three hundred twenty thousand, two hundred twenty".