31712254812 has 192 divisors, whose sum is σ = 98657664000. Its totient is φ = 8617238784.

The previous prime is 31712254759. The next prime is 31712254823. The reversal of 31712254812 is 21845221713.

31712254812 is a `hidden beast` number, since 3 + 171 + 2 + 2 + 5 + 481 + 2 = 666.

It is a super-2 number, since 2×31712254812² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1458114 + ... + 1479702.

It is an arithmetic number, because the mean of its divisors is an integer number (513842000).

Almost surely, 2^31712254812 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 31712254812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49328832000).

31712254812 is an abundant number, since it is smaller than the sum of its proper divisors (66945409188).

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

31712254812 is a wasteful number, since it uses less digits than its factorization.

31712254812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21705 (or 21697 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The spelling of 31712254812 in words is "thirty-one billion, seven hundred twelve million, two hundred fifty-four thousand, eight hundred twelve".