31970212000 has 96 divisors (see below), whose sum is σ = 79882770240. Its totient is φ = 12571244800.

The previous prime is 31970211997. The next prime is 31970212033. The reversal of 31970212000 is 21207913.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168267 + ... + 303733.

It is an arithmetic number, because the mean of its divisors is an integer number (832112190).

Almost surely, 2^31970212000 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 31970212000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39941385120).

31970212000 is an abundant number, since it is smaller than the sum of its proper divisors (47912558240).

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

31970212000 is a wasteful number, since it uses less digits than its factorization.

31970212000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135551 (or 135533 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

Adding to 31970212000 its reverse (21207913), we get a palindrome (31991419913).

The spelling of 31970212000 in words is "thirty-one billion, nine hundred seventy million, two hundred twelve thousand".