31313422535140 has 24 divisors (see below), whose sum is σ = 66497043364920. Its totient is φ = 12384634530048.

The previous prime is 31313422535047. The next prime is 31313422535141. The reversal of 31313422535140 is 4153522431313.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7587424502784 + 23725998032356 = 2754528^2 + 4870934^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31313422535140.

It is not an unprimeable number, because it can be changed into a prime (31313422535141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8795903427 + ... + 8795906986.

It is an arithmetic number, because the mean of its divisors is an integer number (2770710140205).

Almost surely, 2^{31313422535140} is an apocalyptic number.

It is an amenable number.

31313422535140 is an abundant number, since it is smaller than the sum of its proper divisors (35183620829780).

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

31313422535140 is a wasteful number, since it uses less digits than its factorization.

31313422535140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17591810511 (or 17591810509 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 37.

Adding to 31313422535140 its reverse (4153522431313), we get a palindrome (35466944966453).

The spelling of 31313422535140 in words is "thirty-one trillion, three hundred thirteen billion, four hundred twenty-two million, five hundred thirty-five thousand, one hundred forty".