2015521984 has 112 divisors (see below), whose sum is σ = 4689628416. Its totient is φ = 841651200.

The previous prime is 2015521933. The next prime is 2015521987. The reversal of 2015521984 is 4891255102.

It is a tau number, because it is divible by the number of its divisors (112).

It is not an unprimeable number, because it can be changed into a prime (2015521987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3579687 + ... + 3580249.

Almost surely, 2^2015521984 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 2015521984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2344814208).

2015521984 is an abundant number, since it is smaller than the sum of its proper divisors (2674106432).

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

2015521984 is a wasteful number, since it uses less digits than its factorization.

2015521984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774 (or 764 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 2015521984 is about 44894.5651944642. The cubic root of 2015521984 is about 1263.1720663693.

The spelling of 2015521984 in words is "two billion, fifteen million, five hundred twenty-one thousand, nine hundred eighty-four".