31331045345244 has 12 divisors (see below), whose sum is σ = 73105772472264. Its totient is φ = 10443681781744.

The previous prime is 31331045345233. The next prime is 31331045345293. The reversal of 31331045345244 is 44254354013313.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 31331045345196 and 31331045345205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1305460222707 + ... + 1305460222730.

It is an arithmetic number, because the mean of its divisors is an integer number (6092147706022).

Almost surely, 2^{31331045345244} is an apocalyptic number.

It is an amenable number.

31331045345244 is an abundant number, since it is smaller than the sum of its proper divisors (41774727127020).

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

31331045345244 is a wasteful number, since it uses less digits than its factorization.

31331045345244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2610920445444 (or 2610920445442 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 42.

Adding to 31331045345244 its reverse (44254354013313), we get a palindrome (75585399358557).

The spelling of 31331045345244 in words is "thirty-one trillion, three hundred thirty-one billion, forty-five million, three hundred forty-five thousand, two hundred forty-four".