2165291 has 2 divisors, whose sum is σ = 2165292. Its totient is φ = 2165290.

The previous prime is 2165249. The next prime is 2165321. The reversal of 2165291 is 1925612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2165291 - 2¹⁴ = 2148907 is a prime.

It is a super-2 number, since 2×2165291² = 9376970229362, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2165291.

It is not a weakly prime, because it can be changed into another prime (2165201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082645 + 1082646.

It is an arithmetic number, because the mean of its divisors is an integer number (1082646).

2^2165291 is an apocalyptic number.

2165291 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165291 is an equidigital number, since it uses as much as digits as its factorization.

2165291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 26.

The square root of 2165291 is about 1471.4927794590. The cubic root of 2165291 is about 129.3715426896.

The spelling of 2165291 in words is "two million, one hundred sixty-five thousand, two hundred ninety-one".