331312020 has 96 divisors (see below), whose sum is σ = 1003871232. Its totient is φ = 81159168.

The previous prime is 331312019. The next prime is 331312027. The reversal of 331312020 is 20213133.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331312027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 180829 + ... + 182651.

It is an arithmetic number, because the mean of its divisors is an integer number (10456992).

Almost surely, 2^331312020 is an apocalyptic number.

331312020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331312020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501935616).

331312020 is an abundant number, since it is smaller than the sum of its proper divisors (672559212).

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

331312020 is a wasteful number, since it uses less digits than its factorization.

331312020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081 (or 2079 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 331312020 is about 18201.9784638923. The cubic root of 331312020 is about 691.9569315083.

Adding to 331312020 its reverse (20213133), we get a palindrome (351525153).

The spelling of 331312020 in words is "three hundred thirty-one million, three hundred twelve thousand, twenty".