2165617 has 2 divisors, whose sum is σ = 2165618. Its totient is φ = 2165616.

The previous prime is 2165599. The next prime is 2165651. The reversal of 2165617 is 7165612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1648656 + 516961 = 1284^2 + 719^2 .

It is a cyclic number.

It is not a de Polignac number, because 2165617 - 2¹¹ = 2163569 is a prime.

It is not a weakly prime, because it can be changed into another prime (2165687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082808 + 1082809.

It is an arithmetic number, because the mean of its divisors is an integer number (1082809).

2^2165617 is an apocalyptic number.

It is an amenable number.

2165617 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165617 is an equidigital number, since it uses as much as digits as its factorization.

2165617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 28.

The square root of 2165617 is about 1471.6035471553. The cubic root of 2165617 is about 129.3780349666.

The spelling of 2165617 in words is "two million, one hundred sixty-five thousand, six hundred seventeen".