561363503 has 4 divisors (see below), whose sum is σ = 569053488. Its totient is φ = 553673520.

The previous prime is 561363497. The next prime is 561363529. The reversal of 561363503 is 305363165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 561363503 - 2¹⁶ = 561297967 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561363503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561363533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3844883 + ... + 3845028.

It is an arithmetic number, because the mean of its divisors is an integer number (142263372).

Almost surely, 2^561363503 is an apocalyptic number.

561363503 is a deficient number, since it is larger than the sum of its proper divisors (7689985).

561363503 is an equidigital number, since it uses as much as digits as its factorization.

561363503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7689984.

The product of its (nonzero) digits is 24300, while the sum is 32.

The square root of 561363503 is about 23693.1108763708. The cubic root of 561363503 is about 824.9254921387.

The spelling of 561363503 in words is "five hundred sixty-one million, three hundred sixty-three thousand, five hundred three".