31871944192 has 160 divisors (see below), whose sum is σ = 74839209984. Its totient is φ = 13408665600.

The previous prime is 31871944187. The next prime is 31871944217. The reversal of 31871944192 is 29144917813.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 4011648 + ... + 4019584.

Almost surely, 2^31871944192 is an apocalyptic number.

31871944192 is a gapful number since it is divisible by the number (32) 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 31871944192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37419604992).

31871944192 is an abundant number, since it is smaller than the sum of its proper divisors (42967265792).

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

31871944192 is a wasteful number, since it uses less digits than its factorization.

31871944192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8020 (or 8004 counting only the distinct ones).

The product of its digits is 435456, while the sum is 49.

The spelling of 31871944192 in words is "thirty-one billion, eight hundred seventy-one million, nine hundred forty-four thousand, one hundred ninety-two".