561323233 has 2 divisors, whose sum is σ = 561323234. Its totient is φ = 561323232.

The previous prime is 561323179. The next prime is 561323237. The reversal of 561323233 is 332323165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 507916369 + 53406864 = 22537^2 + 7308^2 .

It is a cyclic number.

It is not a de Polignac number, because 561323233 - 2¹⁷ = 561192161 is a prime.

It is not a weakly prime, because it can be changed into another prime (561323237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280661616 + 280661617.

It is an arithmetic number, because the mean of its divisors is an integer number (280661617).

Almost surely, 2^561323233 is an apocalyptic number.

It is an amenable number.

561323233 is a deficient number, since it is larger than the sum of its proper divisors (1).

561323233 is an equidigital number, since it uses as much as digits as its factorization.

561323233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 28.

The square root of 561323233 is about 23692.2610360430. The cubic root of 561323233 is about 824.9057660350.

Adding to 561323233 its reverse (332323165), we get a palindrome (893646398).

The spelling of 561323233 in words is "five hundred sixty-one million, three hundred twenty-three thousand, two hundred thirty-three".