31321231022320 has 80 divisors (see below), whose sum is σ = 78726337575840. Its totient is φ = 11548311616512.

The previous prime is 31321231022311. The next prime is 31321231022327. The reversal of 31321231022320 is 2322013212313.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321231022327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 278404207 + ... + 278516686.

It is an arithmetic number, because the mean of its divisors is an integer number (984079219698).

Almost surely, 2^{31321231022320} is an apocalyptic number.

It is an amenable number.

31321231022320 is an abundant number, since it is smaller than the sum of its proper divisors (47405106553520).

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

31321231022320 is a wasteful number, since it uses less digits than its factorization.

31321231022320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556920962 (or 556920956 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 31321231022320 its reverse (2322013212313), we get a palindrome (33643244234633).

The spelling of 31321231022320 in words is "thirty-one trillion, three hundred twenty-one billion, two hundred thirty-one million, twenty-two thousand, three hundred twenty".