31990541112 has 160 divisors (see below), whose sum is σ = 95357196000. Its totient is φ = 9985130496.

The previous prime is 31990541087. The next prime is 31990541137. The reversal of 31990541112 is 21114509913.

31990541112 is a `hidden beast` number, since 3 + 19 + 90 + 541 + 1 + 12 = 666.

It is an interprime number because it is at equal distance from previous prime (31990541087) and next prime (31990541137).

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2184888 + ... + 2199480.

It is an arithmetic number, because the mean of its divisors is an integer number (595982475).

Almost surely, 2^31990541112 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 31990541112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47678598000).

31990541112 is an abundant number, since it is smaller than the sum of its proper divisors (63366654888).

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

31990541112 is a wasteful number, since it uses less digits than its factorization.

31990541112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14827 (or 14814 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The spelling of 31990541112 in words is "thirty-one billion, nine hundred ninety million, five hundred forty-one thousand, one hundred twelve".