2187523284 has 48 divisors (see below), whose sum is σ = 5355692160. Its totient is φ = 693601920.

The previous prime is 2187523253. The next prime is 2187523291. The reversal of 2187523284 is 4823257812.

It is a congruent number.

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, 28062 + ... + 71850.

It is an arithmetic number, because the mean of its divisors is an integer number (111576920).

Almost surely, 2^2187523284 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 2187523284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2677846080).

2187523284 is an abundant number, since it is smaller than the sum of its proper divisors (3168168876).

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

2187523284 is a wasteful number, since it uses less digits than its factorization.

2187523284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44000 (or 43998 counting only the distinct ones).

The product of its digits is 215040, while the sum is 42.

The square root of 2187523284 is about 46770.9662504422. The cubic root of 2187523284 is about 1298.1281312382.

The spelling of 2187523284 in words is "two billion, one hundred eighty-seven million, five hundred twenty-three thousand, two hundred eighty-four".