31122033511640 has 16 divisors (see below), whose sum is σ = 70024575401280. Its totient is φ = 12448813404640.

The previous prime is 31122033511627. The next prime is 31122033511661. The reversal of 31122033511640 is 4611533022113.

It is a junction number, because it is equal to n+sod(n) for n = 31122033511597 and 31122033511606.

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 3 ways as a sum of consecutive naturals, for example, 389025418856 + ... + 389025418935.

It is an arithmetic number, because the mean of its divisors is an integer number (4376535962580).

Almost surely, 2^{31122033511640} is an apocalyptic number.

It is an amenable number.

31122033511640 is an abundant number, since it is smaller than the sum of its proper divisors (38902541889640).

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

31122033511640 is a wasteful number, since it uses less digits than its factorization.

31122033511640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778050837802 (or 778050837798 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

Adding to 31122033511640 its reverse (4611533022113), we get a palindrome (35733566533753).

The spelling of 31122033511640 in words is "thirty-one trillion, one hundred twenty-two billion, thirty-three million, five hundred eleven thousand, six hundred forty".