2165885244 has 42 divisors (see below), whose sum is σ = 5682856760. Its totient is φ = 721960776.

The previous prime is 2165885237. The next prime is 2165885257. The reversal of 2165885244 is 4425885612.

2165885244 is a `hidden beast` number, since 2 + 16 + 588 + 52 + 4 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2165885244.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 368464 + ... + 374295.

Almost surely, 2^2165885244 is an apocalyptic number.

It is an amenable number.

2165885244 is an abundant number, since it is smaller than the sum of its proper divisors (3516971516).

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

2165885244 is an equidigital number, since it uses as much as digits as its factorization.

2165885244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742781 (or 742764 counting only the distinct ones).

The product of its digits is 614400, while the sum is 45.

The square root of 2165885244 is about 46539.0722296867. The cubic root of 2165885244 is about 1293.8337654649.

The spelling of 2165885244 in words is "two billion, one hundred sixty-five million, eight hundred eighty-five thousand, two hundred forty-four".