31231002434240 has 112 divisors (see below), whose sum is σ = 85018946064384. Its totient is φ = 10704496204800.

The previous prime is 31231002434221. The next prime is 31231002434347. The reversal of 31231002434240 is 4243420013213.

It is a tau number, because it is divible by the number of its divisors (112).

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, 5195825 + ... + 9458255.

Almost surely, 2^{31231002434240} 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 31231002434240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42509473032192).

31231002434240 is an abundant number, since it is smaller than the sum of its proper divisors (53787943630144).

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

31231002434240 is a wasteful number, since it uses less digits than its factorization.

31231002434240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4265726 (or 4265716 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 31231002434240 its reverse (4243420013213), we get a palindrome (35474422447453).

The spelling of 31231002434240 in words is "thirty-one trillion, two hundred thirty-one billion, two million, four hundred thirty-four thousand, two hundred forty".