2021822 has 16 divisors (see below), whose sum is σ = 3423600. Its totient is φ = 887040.

The previous prime is 2021807. The next prime is 2021837. The reversal of 2021822 is 2281202.

It is an interprime number because it is at equal distance from previous prime (2021807) and next prime (2021837).

It is a self number, because there is not a number n which added to its sum of digits gives 2021822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 947 + ... + 2222.

It is an arithmetic number, because the mean of its divisors is an integer number (213975).

2^2021822 is an apocalyptic number.

2021822 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2021822 is a deficient number, since it is larger than the sum of its proper divisors (1401778).

2021822 is a wasteful number, since it uses less digits than its factorization.

2021822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3211.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2021822 is about 1421.9078732464. The cubic root of 2021822 is about 126.4486817103.

The spelling of 2021822 in words is "two million, twenty-one thousand, eight hundred twenty-two".