561233 has 4 divisors (see below), whose sum is σ = 562740. Its totient is φ = 559728.

The previous prime is 561229. The next prime is 561251. The reversal of 561233 is 332165.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 478864 + 82369 = 692^2 + 287^2 .

It is a cyclic number.

It is not a de Polignac number, because 561233 - 2² = 561229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (561733) 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, 263 + ... + 1091.

It is an arithmetic number, because the mean of its divisors is an integer number (140685).

2⁵⁶¹²³³ is an apocalyptic number.

It is an amenable number.

561233 is a deficient number, since it is larger than the sum of its proper divisors (1507).

561233 is an equidigital number, since it uses as much as digits as its factorization.

561233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506.

The product of its digits is 540, while the sum is 20.

The square root of 561233 is about 749.1548571557. The cubic root of 561233 is about 82.4861562324.

Adding to 561233 its reverse (332165), we get a palindrome (893398).

The spelling of 561233 in words is "five hundred sixty-one thousand, two hundred thirty-three".