2165814280 has 64 divisors (see below), whose sum is σ = 5896851840. Its totient is φ = 698883072.

The previous prime is 2165814253. The next prime is 2165814281. The reversal of 2165814280 is 824185612.

It is not an unprimeable number, because it can be changed into a prime (2165814281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222742 + ... + 232261.

It is an arithmetic number, because the mean of its divisors is an integer number (92138310).

Almost surely, 2^2165814280 is an apocalyptic number.

2165814280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2165814280 is an abundant number, since it is smaller than the sum of its proper divisors (3731037560).

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

2165814280 is a wasteful number, since it uses less digits than its factorization.

2165814280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455038 (or 455034 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 2165814280 is about 46538.3098103057. The cubic root of 2165814280 is about 1293.8196347343.

Adding to 2165814280 its reverse (824185612), we get a palindrome (2989999892).

The spelling of 2165814280 in words is "two billion, one hundred sixty-five million, eight hundred fourteen thousand, two hundred eighty".