331313220 has 96 divisors (see below), whose sum is σ = 1178016000. Its totient is φ = 75727872.

The previous prime is 331313219. The next prime is 331313231. The reversal of 331313220 is 22313133.

331313220 is a `hidden beast` number, since 331 + 313 + 2 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 331313193 and 331313202.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40045 + ... + 47604.

It is an arithmetic number, because the mean of its divisors is an integer number (12271000).

Almost surely, 2^331313220 is an apocalyptic number.

331313220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

331313220 is an abundant number, since it is smaller than the sum of its proper divisors (846702780).

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

331313220 is a wasteful number, since it uses less digits than its factorization.

331313220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87674 (or 87666 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 331313220 is about 18202.0114273121. The cubic root of 331313220 is about 691.9577669215.

Adding to 331313220 its reverse (22313133), we get a palindrome (353626353).

The spelling of 331313220 in words is "three hundred thirty-one million, three hundred thirteen thousand, two hundred twenty".