56217777 has 16 divisors (see below), whose sum is σ = 93453312. Its totient is φ = 29203920.

The previous prime is 56217767. The next prime is 56217779. The reversal of 56217777 is 77771265.

It is a happy number.

56217777 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 56217777 - 2¹² = 56213681 is a prime.

56217777 is a modest number, since divided by 7777 gives 5621 as remainder.

It is not an unprimeable number, because it can be changed into a prime (56217779) 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 15 ways as a sum of consecutive naturals, for example, 121453 + ... + 121914.

It is an arithmetic number, because the mean of its divisors is an integer number (5840832).

Almost surely, 2^56217777 is an apocalyptic number.

It is an amenable number.

56217777 is a deficient number, since it is larger than the sum of its proper divisors (37235535).

56217777 is a wasteful number, since it uses less digits than its factorization.

56217777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243388.

The product of its digits is 144060, while the sum is 42.

The square root of 56217777 is about 7497.8514922610. The cubic root of 56217777 is about 383.0815384028.

The spelling of 56217777 in words is "fifty-six million, two hundred seventeen thousand, seven hundred seventy-seven".