320131220320 has 96 divisors (see below), whose sum is σ = 777588336000. Its totient is φ = 124486404096.

The previous prime is 320131220293. The next prime is 320131220341. The reversal of 320131220320 is 23022131023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 977626 + ... + 1263334.

It is an arithmetic number, because the mean of its divisors is an integer number (8099878500).

Almost surely, 2^320131220320 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 320131220320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (388794168000).

320131220320 is an abundant number, since it is smaller than the sum of its proper divisors (457457115680).

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

320131220320 is a wasteful number, since it uses less digits than its factorization.

320131220320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285920 (or 285912 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 320131220320 its reverse (23022131023), we get a palindrome (343153351343).

The spelling of 320131220320 in words is "three hundred twenty billion, one hundred thirty-one million, two hundred twenty thousand, three hundred twenty".