31231040344 has 64 divisors (see below), whose sum is σ = 67733236800. Its totient is φ = 13223583744.

The previous prime is 31231040273. The next prime is 31231040369. The reversal of 31231040344 is 44304013213.

It is a congruent number.

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, 1998192 + ... + 2013760.

It is an arithmetic number, because the mean of its divisors is an integer number (1058331825).

Almost surely, 2^31231040344 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 31231040344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33866618400).

31231040344 is an abundant number, since it is smaller than the sum of its proper divisors (36502196456).

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

31231040344 is a wasteful number, since it uses less digits than its factorization.

31231040344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16012 (or 16008 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31231040344 its reverse (44304013213), we get a palindrome (75535053557).

The spelling of 31231040344 in words is "thirty-one billion, two hundred thirty-one million, forty thousand, three hundred forty-four".