561422503 has 2 divisors, whose sum is σ = 561422504. Its totient is φ = 561422502.

The previous prime is 561422483. The next prime is 561422531. The reversal of 561422503 is 305224165.

It is an a-pointer prime, because the next prime (561422531) can be obtained adding 561422503 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561422503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561422573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280711251 + 280711252.

It is an arithmetic number, because the mean of its divisors is an integer number (280711252).

Almost surely, 2^561422503 is an apocalyptic number.

561422503 is a deficient number, since it is larger than the sum of its proper divisors (1).

561422503 is an equidigital number, since it uses as much as digits as its factorization.

561422503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 561422503 is about 23694.3559313183. The cubic root of 561422503 is about 824.9543913568.

Adding to 561422503 its reverse (305224165), we get a palindrome (866646668).

The spelling of 561422503 in words is "five hundred sixty-one million, four hundred twenty-two thousand, five hundred three".