561055423 has 2 divisors, whose sum is σ = 561055424. Its totient is φ = 561055422.

The previous prime is 561055361. The next prime is 561055483. The reversal of 561055423 is 324550165.

561055423 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 is a cyclic number.

It is not a de Polignac number, because 561055423 - 2⁹ = 561054911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561055483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280527711 + 280527712.

It is an arithmetic number, because the mean of its divisors is an integer number (280527712).

Almost surely, 2^561055423 is an apocalyptic number.

561055423 is a deficient number, since it is larger than the sum of its proper divisors (1).

561055423 is an equidigital number, since it uses as much as digits as its factorization.

561055423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 561055423 is about 23686.6085162059. The cubic root of 561055423 is about 824.7745563367.

The spelling of 561055423 in words is "five hundred sixty-one million, fifty-five thousand, four hundred twenty-three".