331022313220 has 12 divisors (see below), whose sum is σ = 695146857804. Its totient is φ = 132408925280.

The previous prime is 331022313217. The next prime is 331022313257. The reversal of 331022313220 is 22313220133.

It can be written as a sum of positive squares in 2 ways, for example, as 213504988356 + 117517324864 = 462066^2 + 342808^2 .

It is a junction number, because it is equal to n+sod(n) for n = 331022313191 and 331022313200.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8275557811 + ... + 8275557850.

It is an arithmetic number, because the mean of its divisors is an integer number (57928904817).

Almost surely, 2^331022313220 is an apocalyptic number.

It is an amenable number.

331022313220 is an abundant number, since it is smaller than the sum of its proper divisors (364124544584).

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

331022313220 is a wasteful number, since it uses less digits than its factorization.

331022313220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16551115670 (or 16551115668 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 331022313220 its reverse (22313220133), we get a palindrome (353335533353).

The spelling of 331022313220 in words is "three hundred thirty-one billion, twenty-two million, three hundred thirteen thousand, two hundred twenty".