2001822 has 16 divisors (see below), whose sum is σ = 4097280. Its totient is φ = 651672.

The previous prime is 2001809. The next prime is 2001833. The reversal of 2001822 is 2281002.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3622 + ... + 4137.

It is an arithmetic number, because the mean of its divisors is an integer number (256080).

2^2001822 is an apocalyptic number.

2001822 is an abundant number, since it is smaller than the sum of its proper divisors (2095458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001822 is a wasteful number, since it uses less digits than its factorization.

2001822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7807.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2001822 is about 1414.8575900069. The cubic root of 2001822 is about 126.0303529797.

Adding to 2001822 its reverse (2281002), we get a palindrome (4282824).

The spelling of 2001822 in words is "two million, one thousand, eight hundred twenty-two".