31130453440240 has 160 divisors (see below), whose sum is σ = 90286775276544. Its totient is φ = 9697741547520.

The previous prime is 31130453440213. The next prime is 31130453440253. The reversal of 31130453440240 is 4204435403113.

It is a junction number, because it is equal to n+sod(n) for n = 31130453440196 and 31130453440205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10009452 + ... + 12745588.

Almost surely, 2^{31130453440240} 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 31130453440240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45143387638272).

31130453440240 is an abundant number, since it is smaller than the sum of its proper divisors (59156321836304).

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

31130453440240 is a wasteful number, since it uses less digits than its factorization.

31130453440240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2738015 (or 2738009 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 34.

Adding to 31130453440240 its reverse (4204435403113), we get a palindrome (35334888843353).

The spelling of 31130453440240 in words is "thirty-one trillion, one hundred thirty billion, four hundred fifty-three million, four hundred forty thousand, two hundred forty".