2165297 has 4 divisors (see below), whose sum is σ = 2279280. Its totient is φ = 2051316.

The previous prime is 2165291. The next prime is 2165321. The reversal of 2165297 is 7925612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2165297 - 2¹⁰ = 2164273 is a prime.

It is a super-2 number, since 2×2165297² = 9377022196418, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2165291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56963 + ... + 57000.

It is an arithmetic number, because the mean of its divisors is an integer number (569820).

2^2165297 is an apocalyptic number.

It is an amenable number.

2165297 is a deficient number, since it is larger than the sum of its proper divisors (113983).

2165297 is a wasteful number, since it uses less digits than its factorization.

2165297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113982.

The product of its digits is 7560, while the sum is 32.

The square root of 2165297 is about 1471.4948182036. The cubic root of 2165297 is about 129.3716621853.

The spelling of 2165297 in words is "two million, one hundred sixty-five thousand, two hundred ninety-seven".