2165114440 has 32 divisors (see below), whose sum is σ = 4874204160. Its totient is φ = 865566400.

The previous prime is 2165114411. The next prime is 2165114443. The reversal of 2165114440 is 444115612.

It is a junction number, because it is equal to n+sod(n) for n = 2165114399 and 2165114408.

It is not an unprimeable number, because it can be changed into a prime (2165114443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63225 + ... + 91255.

It is an arithmetic number, because the mean of its divisors is an integer number (152318880).

Almost surely, 2^2165114440 is an apocalyptic number.

2165114440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2165114440 is an abundant number, since it is smaller than the sum of its proper divisors (2709089720).

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

2165114440 is a wasteful number, since it uses less digits than its factorization.

2165114440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29973 (or 29969 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 2165114440 is about 46530.7902361436. The cubic root of 2165114440 is about 1293.6802623226.

The spelling of 2165114440 in words is "two billion, one hundred sixty-five million, one hundred fourteen thousand, four hundred forty".