331030031220 has 72 divisors (see below), whose sum is σ = 1147570779264. Its totient is φ = 75664006848.

The previous prime is 331030031201. The next prime is 331030031221. The reversal of 331030031220 is 22130030133.

331030031220 is a `hidden beast` number, since 3 + 31 + 0 + 300 + 312 + 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 = 331030031193 and 331030031202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331030031221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131359864 + ... + 131362383.

Almost surely, 2^331030031220 is an apocalyptic number.

331030031220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

331030031220 is an abundant number, since it is smaller than the sum of its proper divisors (816540748044).

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

331030031220 is a wasteful number, since it uses less digits than its factorization.

331030031220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262722269 (or 262722264 counting only the distinct ones).

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

Adding to 331030031220 its reverse (22130030133), we get a palindrome (353160061353).

The spelling of 331030031220 in words is "three hundred thirty-one billion, thirty million, thirty-one thousand, two hundred twenty".