31322057540 has 48 divisors (see below), whose sum is σ = 66944392704. Its totient is φ = 12307612800.

The previous prime is 31322057531. The next prime is 31322057561. The reversal of 31322057540 is 4575022313.

It is a junction number, because it is equal to n+sod(n) for n = 31322057497 and 31322057506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353525 + ... + 433155.

It is an arithmetic number, because the mean of its divisors is an integer number (1394674848).

Almost surely, 2^31322057540 is an apocalyptic number.

It is an amenable number.

31322057540 is an abundant number, since it is smaller than the sum of its proper divisors (35622335164).

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

31322057540 is a wasteful number, since it uses less digits than its factorization.

31322057540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79988 (or 79986 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 32.

Adding to 31322057540 its reverse (4575022313), we get a palindrome (35897079853).

The spelling of 31322057540 in words is "thirty-one billion, three hundred twenty-two million, fifty-seven thousand, five hundred forty".