31969091000 has 512 divisors, whose sum is σ = 98338406400. Its totient is φ = 9437760000.

The previous prime is 31969090997. The next prime is 31969091047. The reversal of 31969091000 is 19096913.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 140832887 + ... + 140833113.

It is an arithmetic number, because the mean of its divisors is an integer number (192067200).

Almost surely, 2^31969091000 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 31969091000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49169203200).

31969091000 is an abundant number, since it is smaller than the sum of its proper divisors (66369315400).

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

31969091000 is a wasteful number, since it uses less digits than its factorization.

31969091000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 38.

The spelling of 31969091000 in words is "thirty-one billion, nine hundred sixty-nine million, ninety-one thousand".