561275543 has 2 divisors, whose sum is σ = 561275544. Its totient is φ = 561275542.

The previous prime is 561275521. The next prime is 561275567. The reversal of 561275543 is 345572165.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561275543 - 2⁶ = 561275479 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561275497 and 561275506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561277543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280637771 + 280637772.

It is an arithmetic number, because the mean of its divisors is an integer number (280637772).

Almost surely, 2^561275543 is an apocalyptic number.

561275543 is a deficient number, since it is larger than the sum of its proper divisors (1).

561275543 is an equidigital number, since it uses as much as digits as its factorization.

561275543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 126000, while the sum is 38.

The square root of 561275543 is about 23691.2545678780. The cubic root of 561275543 is about 824.8824040528.

The spelling of 561275543 in words is "five hundred sixty-one million, two hundred seventy-five thousand, five hundred forty-three".