331010020 has 144 divisors (see below), whose sum is σ = 841921920. Its totient is φ = 108725760.

The previous prime is 331010003. The next prime is 331010021. The reversal of 331010020 is 20010133.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 331009979 and 331010006.

It is not an unprimeable number, because it can be changed into a prime (331010021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1057384 + ... + 1057696.

It is an arithmetic number, because the mean of its divisors is an integer number (5846680).

Almost surely, 2^331010020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331010020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (420960960).

331010020 is an abundant number, since it is smaller than the sum of its proper divisors (510911900).

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

331010020 is a wasteful number, since it uses less digits than its factorization.

331010020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 331010020 is about 18193.6807710809. The cubic root of 331010020 is about 691.7466216823.

Adding to 331010020 its reverse (20010133), we get a palindrome (351020153).

The spelling of 331010020 in words is "three hundred thirty-one million, ten thousand, twenty".