56218761 has 12 divisors (see below), whose sum is σ = 81473392. Its totient is φ = 37355256.

The previous prime is 56218741. The next prime is 56218783. The reversal of 56218761 is 16781265.

56218761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56218761 - 2⁶ = 56218697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56218741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7411 + ... + 12936.

Almost surely, 2^56218761 is an apocalyptic number.

It is an amenable number.

56218761 is a deficient number, since it is larger than the sum of its proper divisors (25254631).

56218761 is a wasteful number, since it uses less digits than its factorization.

56218761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20660 (or 20657 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 56218761 is about 7497.9171107715. The cubic root of 56218761 is about 383.0837734612.

The spelling of 56218761 in words is "fifty-six million, two hundred eighteen thousand, seven hundred sixty-one".