31272918912 has 256 divisors, whose sum is σ = 95246131200. Its totient is φ = 10095611904.

The previous prime is 31272918899. The next prime is 31272918913. The reversal of 31272918912 is 21981927213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31272918913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18872388 + ... + 18874044.

It is an arithmetic number, because the mean of its divisors is an integer number (372055200).

Almost surely, 2^31272918912 is an apocalyptic number.

31272918912 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 31272918912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47623065600).

31272918912 is an abundant number, since it is smaller than the sum of its proper divisors (63973212288).

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

31272918912 is a wasteful number, since it uses less digits than its factorization.

31272918912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850 (or 1832 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The spelling of 31272918912 in words is "thirty-one billion, two hundred seventy-two million, nine hundred eighteen thousand, nine hundred twelve".