31322013201320 has 16 divisors (see below), whose sum is σ = 70474529703060. Its totient is φ = 12528805280512.

The previous prime is 31322013201317. The next prime is 31322013201329. The reversal of 31322013201320 is 2310231022313.

It can be written as a sum of positive squares in 2 ways, for example, as 30031912499044 + 1290100702276 = 5480138^2 + 1135826^2 .

It is not an unprimeable number, because it can be changed into a prime (31322013201329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391525164977 + ... + 391525165056.

Almost surely, 2^{31322013201320} is an apocalyptic number.

It is an amenable number.

31322013201320 is an abundant number, since it is smaller than the sum of its proper divisors (39152516501740).

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

31322013201320 is a wasteful number, since it uses less digits than its factorization.

31322013201320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783050330044 (or 783050330040 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31322013201320 its reverse (2310231022313), we get a palindrome (33632244223633).

The spelling of 31322013201320 in words is "thirty-one trillion, three hundred twenty-two billion, thirteen million, two hundred one thousand, three hundred twenty".