331330020 has 192 divisors, whose sum is σ = 1105477632. Its totient is φ = 72576000.

The previous prime is 331330009. The next prime is 331330039. The reversal of 331330020 is 20033133.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1222485 + ... + 1222755.

It is an arithmetic number, because the mean of its divisors is an integer number (5757696).

Almost surely, 2^331330020 is an apocalyptic number.

331330020 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 331330020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (552738816).

331330020 is an abundant number, since it is smaller than the sum of its proper divisors (774147612).

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

331330020 is a wasteful number, since it uses less digits than its factorization.

331330020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 15.

The square root of 331330020 is about 18202.4729089209. The cubic root of 331330020 is about 691.9694624946.

Adding to 331330020 its reverse (20033133), we get a palindrome (351363153).

It can be divided in two parts, 3313 and 30020, that added together give a palindrome (33333).

The spelling of 331330020 in words is "three hundred thirty-one million, three hundred thirty thousand, twenty".