331343320 has 128 divisors (see below), whose sum is σ = 936230400. Its totient is φ = 102528000.

The previous prime is 331343281. The next prime is 331343321. The reversal of 331343320 is 23343133.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 331343291 and 331343300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331343321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 551020 + ... + 551620.

It is an arithmetic number, because the mean of its divisors is an integer number (7314300).

Almost surely, 2^331343320 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 331343320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (468115200).

331343320 is an abundant number, since it is smaller than the sum of its proper divisors (604887080).

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

331343320 is a wasteful number, since it uses less digits than its factorization.

331343320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809 (or 805 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 22.

The square root of 331343320 is about 18202.8382402306. The cubic root of 331343320 is about 691.9787212097.

Adding to 331343320 its reverse (23343133), we get a palindrome (354686453).

The spelling of 331343320 in words is "three hundred thirty-one million, three hundred forty-three thousand, three hundred twenty".