561222863 has 2 divisors, whose sum is σ = 561222864. Its totient is φ = 561222862.

The previous prime is 561222833. The next prime is 561222881. The reversal of 561222863 is 368222165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561222863 - 2¹⁰ = 561221839 is a prime.

It is a super-2 number, since 2×561222863² = 629942203907833538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561222833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280611431 + 280611432.

It is an arithmetic number, because the mean of its divisors is an integer number (280611432).

Almost surely, 2^561222863 is an apocalyptic number.

561222863 is a deficient number, since it is larger than the sum of its proper divisors (1).

561222863 is an equidigital number, since it uses as much as digits as its factorization.

561222863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 35.

The square root of 561222863 is about 23690.1427391225. The cubic root of 561222863 is about 824.8565960724.

It can be divided in two parts, 56122 and 2863, that added together give a palindrome (58985).

The spelling of 561222863 in words is "five hundred sixty-one million, two hundred twenty-two thousand, eight hundred sixty-three".