201822 has 8 divisors (see below), whose sum is σ = 403656. Its totient is φ = 67272.

The previous prime is 201821. The next prime is 201823. The reversal of 201822 is 228102.

201822 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (201821) and next prime (201823).

It is a sphenic number, since it is the product of 3 distinct primes.

201822 is an admirable number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16813 + ... + 16824.

It is an arithmetic number, because the mean of its divisors is an integer number (50457).

2²⁰¹⁸²² is an apocalyptic number.

201822 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

201822 is a wasteful number, since it uses less digits than its factorization.

201822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33642.

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

The square root of 201822 is about 449.2460350409. The cubic root of 201822 is about 58.6574035536.

Adding to 201822 its reverse (228102), we get a palindrome (429924).

The spelling of 201822 in words is "two hundred one thousand, eight hundred twenty-two".