2165816148 has 12 divisors (see below), whose sum is σ = 5053571040. Its totient is φ = 721938712.

The previous prime is 2165816143. The next prime is 2165816161. The reversal of 2165816148 is 8416185612.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165816143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90242328 + ... + 90242351.

It is an arithmetic number, because the mean of its divisors is an integer number (421130920).

Almost surely, 2^2165816148 is an apocalyptic number.

It is an amenable number.

2165816148 is an abundant number, since it is smaller than the sum of its proper divisors (2887754892).

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

2165816148 is a wasteful number, since it uses less digits than its factorization.

2165816148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180484686 (or 180484684 counting only the distinct ones).

The product of its digits is 92160, while the sum is 42.

The square root of 2165816148 is about 46538.3298797883. The cubic root of 2165816148 is about 1293.8200067044.

The spelling of 2165816148 in words is "two billion, one hundred sixty-five million, eight hundred sixteen thousand, one hundred forty-eight".