31322431340 has 48 divisors (see below), whose sum is σ = 67833914400. Its totient is φ = 12141304320.

The previous prime is 31322431307. The next prime is 31322431369. The reversal of 31322431340 is 4313422313.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6002 + ... + 250361.

It is an arithmetic number, because the mean of its divisors is an integer number (1413206550).

Almost surely, 2^31322431340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31322431340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33916957200).

31322431340 is an abundant number, since it is smaller than the sum of its proper divisors (36511483060).

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

31322431340 is a wasteful number, since it uses less digits than its factorization.

31322431340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256562 (or 256560 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 31322431340 its reverse (4313422313), we get a palindrome (35635853653).

The spelling of 31322431340 in words is "thirty-one billion, three hundred twenty-two million, four hundred thirty-one thousand, three hundred forty".