561622213 has 2 divisors, whose sum is σ = 561622214. Its totient is φ = 561622212.

The previous prime is 561622199. The next prime is 561622219. The reversal of 561622213 is 312226165.

561622213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 362445444 + 199176769 = 19038^2 + 14113^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561622213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561622219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280811106 + 280811107.

It is an arithmetic number, because the mean of its divisors is an integer number (280811107).

Almost surely, 2^561622213 is an apocalyptic number.

It is an amenable number.

561622213 is a deficient number, since it is larger than the sum of its proper divisors (1).

561622213 is an equidigital number, since it uses as much as digits as its factorization.

561622213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 28.

The square root of 561622213 is about 23698.5698513644. The cubic root of 561622213 is about 825.0521977381.

Adding to 561622213 its reverse (312226165), we get a palindrome (873848378).

The spelling of 561622213 in words is "five hundred sixty-one million, six hundred twenty-two thousand, two hundred thirteen".