320131331000 has 128 divisors (see below), whose sum is σ = 815050978560. Its totient is φ = 116983296000.

The previous prime is 320131330973. The next prime is 320131331083. The reversal of 320131331000 is 133131023.

It is a super-2 number, since 2×320131331000² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 320131331000.

It is a congruent number.

It is an unprimeable number.

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, 1134065 + ... + 1387935.

It is an arithmetic number, because the mean of its divisors is an integer number (6367585770).

Almost surely, 2^320131331000 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 320131331000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (407525489280).

320131331000 is an abundant number, since it is smaller than the sum of its proper divisors (494919647560).

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

320131331000 is a wasteful number, since it uses less digits than its factorization.

320131331000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254002 (or 253988 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 320131331000 its reverse (133131023), we get a palindrome (320264462023).

The spelling of 320131331000 in words is "three hundred twenty billion, one hundred thirty-one million, three hundred thirty-one thousand".