331543020 has 96 divisors (see below), whose sum is σ = 948326400. Its totient is φ = 86526720.

The previous prime is 331542983. The next prime is 331543021. The reversal of 331543020 is 20345133.

331543020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×331543020² = 219841548221440800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (331543021) 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, 949806 + ... + 950154.

It is an arithmetic number, because the mean of its divisors is an integer number (9878400).

Almost surely, 2^331543020 is an apocalyptic number.

331543020 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 331543020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (474163200).

331543020 is an abundant number, since it is smaller than the sum of its proper divisors (616783380).

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

331543020 is a wasteful number, since it uses less digits than its factorization.

331543020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655 (or 653 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 331543020 is about 18208.3228222700. The cubic root of 331543020 is about 692.1177113846.

Adding to 331543020 its reverse (20345133), we get a palindrome (351888153).

The spelling of 331543020 in words is "three hundred thirty-one million, five hundred forty-three thousand, twenty".