2165822 has 4 divisors (see below), whose sum is σ = 3248736. Its totient is φ = 1082910.

The previous prime is 2165819. The next prime is 2165843. The reversal of 2165822 is 2285612.

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

It is a d-powerful number, because it can be written as 2 + 1 + 6 + 5⁵ + 8⁵ + 2¹⁵ + 2²¹ .

It is a junction number, because it is equal to n+sod(n) for n = 2165791 and 2165800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 541454 + ... + 541457.

It is an arithmetic number, because the mean of its divisors is an integer number (812184).

2^2165822 is an apocalyptic number.

2165822 is a deficient number, since it is larger than the sum of its proper divisors (1082914).

2165822 is a wasteful number, since it uses less digits than its factorization.

2165822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082913.

The product of its digits is 1920, while the sum is 26.

The square root of 2165822 is about 1471.6731974185. The cubic root of 2165822 is about 129.3821171997.

The spelling of 2165822 in words is "two million, one hundred sixty-five thousand, eight hundred twenty-two".