56561243 has 2 divisors, whose sum is σ = 56561244. Its totient is φ = 56561242.

The previous prime is 56561237. The next prime is 56561251. The reversal of 56561243 is 34216565.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56561243 - 2¹⁰ = 56560219 is a prime.

It is not a weakly prime, because it can be changed into another prime (56561273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28280621 + 28280622.

It is an arithmetic number, because the mean of its divisors is an integer number (28280622).

Almost surely, 2^56561243 is an apocalyptic number.

56561243 is a deficient number, since it is larger than the sum of its proper divisors (1).

56561243 is an equidigital number, since it uses as much as digits as its factorization.

56561243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 32.

The square root of 56561243 is about 7520.7209095937. The cubic root of 56561243 is about 383.8601084584.

The spelling of 56561243 in words is "fifty-six million, five hundred sixty-one thousand, two hundred forty-three".