331304013 has 24 divisors (see below), whose sum is σ = 501883200. Its totient is φ = 218373408.

The previous prime is 331304009. The next prime is 331304021. The reversal of 331304013 is 310403133.

It is not a de Polignac number, because 331304013 - 2² = 331304009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331304023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13968 + ... + 29286.

It is an arithmetic number, because the mean of its divisors is an integer number (20911800).

Almost surely, 2^331304013 is an apocalyptic number.

It is an amenable number.

331304013 is a deficient number, since it is larger than the sum of its proper divisors (170579187).

331304013 is an equidigital number, since it uses as much as digits as its factorization.

331304013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15423 (or 15411 counting only the distinct ones).

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

The square root of 331304013 is about 18201.7585139458. The cubic root of 331304013 is about 691.9513571620.

Adding to 331304013 its reverse (310403133), we get a palindrome (641707146).

The spelling of 331304013 in words is "three hundred thirty-one million, three hundred four thousand, thirteen".