31321052320 has 24 divisors (see below), whose sum is σ = 73995986484. Its totient is φ = 12528420864.

The previous prime is 31321052317. The next prime is 31321052333. The reversal of 31321052320 is 2325012313.

It can be written as a sum of positive squares in 2 ways, for example, as 30503321104 + 817731216 = 174652^2 + 28596^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31321052291 and 31321052300.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97878129 + ... + 97878448.

Almost surely, 2^31321052320 is an apocalyptic number.

It is an amenable number.

31321052320 is an abundant number, since it is smaller than the sum of its proper divisors (42674934164).

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

31321052320 is a wasteful number, since it uses less digits than its factorization.

31321052320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195756592 (or 195756584 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

Adding to 31321052320 its reverse (2325012313), we get a palindrome (33646064633).

The spelling of 31321052320 in words is "thirty-one billion, three hundred twenty-one million, fifty-two thousand, three hundred twenty".