320331343540 has 24 divisors (see below), whose sum is σ = 724441654440. Its totient is φ = 118276188288.

The previous prime is 320331343529. The next prime is 320331343601. The reversal of 320331343540 is 45343133023.

It can be written as a sum of positive squares in 4 ways, for example, as 61720446096 + 258610897444 = 248436^2 + 508538^2 .

It is a super-2 number, since 2×320331343540² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 616021555 + ... + 616022074.

It is an arithmetic number, because the mean of its divisors is an integer number (30185068935).

Almost surely, 2^320331343540 is an apocalyptic number.

It is an amenable number.

320331343540 is an abundant number, since it is smaller than the sum of its proper divisors (404110310900).

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

320331343540 is a wasteful number, since it uses less digits than its factorization.

320331343540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232043651 (or 1232043649 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 31.

Adding to 320331343540 its reverse (45343133023), we get a palindrome (365674476563).

The spelling of 320331343540 in words is "three hundred twenty billion, three hundred thirty-one million, three hundred forty-three thousand, five hundred forty".