561223 has 8 divisors (see below), whose sum is σ = 631008. Its totient is φ = 495264.

The previous prime is 561199. The next prime is 561229. The reversal of 561223 is 322165.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 561223 - 2⁵ = 561191 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 640 + ... + 1237.

It is an arithmetic number, because the mean of its divisors is an integer number (78876).

2⁵⁶¹²²³ is an apocalyptic number.

561223 is a deficient number, since it is larger than the sum of its proper divisors (69785).

561223 is a wasteful number, since it uses less digits than its factorization.

561223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913.

The product of its digits is 360, while the sum is 19.

The square root of 561223 is about 749.1481829385. The cubic root of 561223 is about 82.4856663191.

Adding to 561223 its reverse (322165), we get a palindrome (883388).

It can be divided in two parts, 561 and 223, that added together give a square (784 = 28²).

The spelling of 561223 in words is "five hundred sixty-one thousand, two hundred twenty-three".