2271165 has 32 divisors (see below), whose sum is σ = 4126080. Its totient is φ = 1057536.

The previous prime is 2271163. The next prime is 2271221. The reversal of 2271165 is 5611722.

It is not a de Polignac number, because 2271165 - 2¹ = 2271163 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2271161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3399 + ... + 4011.

It is an arithmetic number, because the mean of its divisors is an integer number (128940).

2^2271165 is an apocalyptic number.

It is an amenable number.

2271165 is a deficient number, since it is larger than the sum of its proper divisors (1854915).

2271165 is a wasteful number, since it uses less digits than its factorization.

2271165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653.

The product of its digits is 840, while the sum is 24.

The square root of 2271165 is about 1507.0384865689. The cubic root of 2271165 is about 131.4466620948.

Adding to 2271165 its reverse (5611722), we get a palindrome (7882887).

The spelling of 2271165 in words is "two million, two hundred seventy-one thousand, one hundred sixty-five".