561822 has 8 divisors (see below), whose sum is σ = 1123656. Its totient is φ = 187272.

The previous prime is 561809. The next prime is 561829. The reversal of 561822 is 228165.

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

561822 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 561792 and 561801.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 561822.

It is not an unprimeable number, because it can be changed into a prime (561829) 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, 46813 + ... + 46824.

It is an arithmetic number, because the mean of its divisors is an integer number (140457).

2⁵⁶¹⁸²² is an apocalyptic number.

561822 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.

561822 is a wasteful number, since it uses less digits than its factorization.

561822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93642.

The product of its digits is 960, while the sum is 24.

The square root of 561822 is about 749.5478637152. The cubic root of 561822 is about 82.5150018633.

Adding to 561822 its reverse (228165), we get a palindrome (789987).

The spelling of 561822 in words is "five hundred sixty-one thousand, eight hundred twenty-two".