320131332340 has 96 divisors (see below), whose sum is σ = 727993889280. Its totient is φ = 117886788096.

The previous prime is 320131332319. The next prime is 320131332343. The reversal of 320131332340 is 43233131023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320131332343) 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 31 ways as a sum of consecutive naturals, for example, 4190929 + ... + 4266631.

It is an arithmetic number, because the mean of its divisors is an integer number (7583269680).

Almost surely, 2^320131332340 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 320131332340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (363996944640).

320131332340 is an abundant number, since it is smaller than the sum of its proper divisors (407862556940).

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

320131332340 is a wasteful number, since it uses less digits than its factorization.

320131332340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76081 (or 76079 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 320131332340 its reverse (43233131023), we get a palindrome (363364463363).

The spelling of 320131332340 in words is "three hundred twenty billion, one hundred thirty-one million, three hundred thirty-two thousand, three hundred forty".