56555563 has 4 divisors (see below), whose sum is σ = 58379968. Its totient is φ = 54731160.

The previous prime is 56555561. The next prime is 56555567. The reversal of 56555563 is 36555565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36555565 = 5 ⋅7311113.

It is a cyclic number.

It is not a de Polignac number, because 56555563 - 2¹ = 56555561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56555561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 912156 + ... + 912217.

It is an arithmetic number, because the mean of its divisors is an integer number (14594992).

Almost surely, 2^56555563 is an apocalyptic number.

56555563 is a deficient number, since it is larger than the sum of its proper divisors (1824405).

56555563 is a wasteful number, since it uses less digits than its factorization.

56555563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824404.

The product of its digits is 337500, while the sum is 40.

The square root of 56555563 is about 7520.3432767394. The cubic root of 56555563 is about 383.8472586794.

The spelling of 56555563 in words is "fifty-six million, five hundred fifty-five thousand, five hundred sixty-three".