2185165 has 4 divisors (see below), whose sum is σ = 2622204. Its totient is φ = 1748128.

The previous prime is 2185151. The next prime is 2185181. The reversal of 2185165 is 5615812.

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

It can be written as a sum of positive squares in 2 ways, for example, as 386884 + 1798281 = 622^2 + 1341^2 .

It is a cyclic number.

It is not a de Polignac number, because 2185165 - 2⁷ = 2185037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218512 + ... + 218521.

It is an arithmetic number, because the mean of its divisors is an integer number (655551).

2^2185165 is an apocalyptic number.

It is an amenable number.

2185165 is a deficient number, since it is larger than the sum of its proper divisors (437039).

2185165 is an equidigital number, since it uses as much as digits as its factorization.

2185165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437038.

The product of its digits is 2400, while the sum is 28.

The square root of 2185165 is about 1478.2303609384. The cubic root of 2185165 is about 129.7661476309.

The spelling of 2185165 in words is "two million, one hundred eighty-five thousand, one hundred sixty-five".