2165516359 has 4 divisors (see below), whose sum is σ = 2166629400. Its totient is φ = 2164403320.

The previous prime is 2165516351. The next prime is 2165516371. The reversal of 2165516359 is 9536155612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2165516359 - 2³ = 2165516351 is a prime.

It is a super-2 number, since 2×2165516359² = 9378922202193233762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165516351) 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 3 ways as a sum of consecutive naturals, for example, 553597 + ... + 557494.

It is an arithmetic number, because the mean of its divisors is an integer number (541657350).

Almost surely, 2^2165516359 is an apocalyptic number.

2165516359 is a deficient number, since it is larger than the sum of its proper divisors (1113041).

2165516359 is a wasteful number, since it uses less digits than its factorization.

2165516359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113040.

The product of its digits is 243000, while the sum is 43.

The square root of 2165516359 is about 46535.1088856575. The cubic root of 2165516359 is about 1293.7603077461.

The spelling of 2165516359 in words is "two billion, one hundred sixty-five million, five hundred sixteen thousand, three hundred fifty-nine".