31430321344 has 56 divisors (see below), whose sum is σ = 66119898240. Its totient is φ = 14772473856.

The previous prime is 31430321317. The next prime is 31430321357. The reversal of 31430321344 is 44312303413.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 884529 + ... + 919375.

Almost surely, 2^31430321344 is an apocalyptic number.

31430321344 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31430321344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33059949120).

31430321344 is an abundant number, since it is smaller than the sum of its proper divisors (34689576896).

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

31430321344 is a wasteful number, since it uses less digits than its factorization.

31430321344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35705 (or 35695 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 31430321344 its reverse (44312303413), we get a palindrome (75742624757).

The spelling of 31430321344 in words is "thirty-one billion, four hundred thirty million, three hundred twenty-one thousand, three hundred forty-four".