2165228727 has 8 divisors (see below), whose sum is σ = 2887758720. Its totient is φ = 1443092280.

The previous prime is 2165228701. The next prime is 2165228731. The reversal of 2165228727 is 7278225612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2165228727 - 2⁷ = 2165228599 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165228227) 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, 85299 + ... + 107732.

It is an arithmetic number, because the mean of its divisors is an integer number (360969840).

Almost surely, 2^2165228727 is an apocalyptic number.

2165228727 is a deficient number, since it is larger than the sum of its proper divisors (722529993).

2165228727 is a wasteful number, since it uses less digits than its factorization.

2165228727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196773.

The product of its digits is 188160, while the sum is 42.

The square root of 2165228727 is about 46532.0182992313. The cubic root of 2165228727 is about 1293.7030245120.

The spelling of 2165228727 in words is "two billion, one hundred sixty-five million, two hundred twenty-eight thousand, seven hundred twenty-seven".