331130320 has 20 divisors (see below), whose sum is σ = 769878180. Its totient is φ = 132452096.

The previous prime is 331130311. The next prime is 331130321. The reversal of 331130320 is 23031133.

331130320 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 210482064 + 120648256 = 14508^2 + 10984^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 331130294 and 331130303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331130321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2069485 + ... + 2069644.

It is an arithmetic number, because the mean of its divisors is an integer number (38493909).

Almost surely, 2^331130320 is an apocalyptic number.

It is an amenable number.

331130320 is an abundant number, since it is smaller than the sum of its proper divisors (438747860).

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

331130320 is a wasteful number, since it uses less digits than its factorization.

331130320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4139142 (or 4139136 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 16.

The square root of 331130320 is about 18196.9865637143. The cubic root of 331130320 is about 691.8304127403.

Adding to 331130320 its reverse (23031133), we get a palindrome (354161453).

The spelling of 331130320 in words is "three hundred thirty-one million, one hundred thirty thousand, three hundred twenty".