31313031344 has 60 divisors (see below), whose sum is σ = 70968727800. Its totient is φ = 13344839424.

The previous prime is 31313031307. The next prime is 31313031361. The reversal of 31313031344 is 44313031313.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28772 + ... + 251900.

It is an arithmetic number, because the mean of its divisors is an integer number (1182812130).

Almost surely, 2^31313031344 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 31313031344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35484363900).

31313031344 is an abundant number, since it is smaller than the sum of its proper divisors (39655696456).

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

31313031344 is a wasteful number, since it uses less digits than its factorization.

31313031344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223330 (or 223317 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 31313031344 its reverse (44313031313), we get a palindrome (75626062657).

The spelling of 31313031344 in words is "thirty-one billion, three hundred thirteen million, thirty-one thousand, three hundred forty-four".