561277543 has 2 divisors, whose sum is σ = 561277544. Its totient is φ = 561277542.

The previous prime is 561277529. The next prime is 561277553. The reversal of 561277543 is 345772165.

561277543 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 561277543 - 2⁵ = 561277511 is a prime.

It is a super-2 number, since 2×561277543² = 630064960552233698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 561277496 and 561277505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561277523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280638771 + 280638772.

It is an arithmetic number, because the mean of its divisors is an integer number (280638772).

Almost surely, 2^561277543 is an apocalyptic number.

561277543 is a deficient number, since it is larger than the sum of its proper divisors (1).

561277543 is an equidigital number, since it uses as much as digits as its factorization.

561277543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176400, while the sum is 40.

The square root of 561277543 is about 23691.2967775088. The cubic root of 561277543 is about 824.8833838228.

The spelling of 561277543 in words is "five hundred sixty-one million, two hundred seventy-seven thousand, five hundred forty-three".