56216566 has 16 divisors (see below), whose sum is σ = 98613504. Its totient is φ = 23532264.

The previous prime is 56216549. The next prime is 56216597. The reversal of 56216566 is 66561265.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 46090 + ... + 47293.

It is an arithmetic number, because the mean of its divisors is an integer number (6163344).

Almost surely, 2^56216566 is an apocalyptic number.

56216566 is a deficient number, since it is larger than the sum of its proper divisors (42396938).

56216566 is a wasteful number, since it uses less digits than its factorization.

56216566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93435.

The product of its digits is 64800, while the sum is 37.

The square root of 56216566 is about 7497.7707353586. The cubic root of 56216566 is about 383.0787877007.

The spelling of 56216566 in words is "fifty-six million, two hundred sixteen thousand, five hundred sixty-six".