2131747884 has 72 divisors (see below), whose sum is σ = 6197723168. Its totient is φ = 605180160.

The previous prime is 2131747879. The next prime is 2131747897. The reversal of 2131747884 is 4887471312.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12624 + ... + 66504.

Almost surely, 2^2131747884 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 2131747884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3098861584).

2131747884 is an abundant number, since it is smaller than the sum of its proper divisors (4065975284).

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

2131747884 is a wasteful number, since it uses less digits than its factorization.

2131747884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54055 (or 54050 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 2131747884 is about 46170.8553527006. The cubic root of 2131747884 is about 1287.0001974197. Note that the first 3 decimals are identical.

The spelling of 2131747884 in words is "two billion, one hundred thirty-one million, seven hundred forty-seven thousand, eight hundred eighty-four".