56681705 has 8 divisors (see below), whose sum is σ = 68692104. Its totient is φ = 44896000.

The previous prime is 56681701. The next prime is 56681711. The reversal of 56681705 is 50718665.

56681705 = 426² + 427² + ... + 627².

It is a happy number.

56681705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 39904489 + 16777216 = 6317^2 + 4096^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56681705 - 2² = 56681701 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56681701) 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 7 ways as a sum of consecutive naturals, for example, 55616 + ... + 56625.

It is an arithmetic number, because the mean of its divisors is an integer number (8586513).

Almost surely, 2^56681705 is an apocalyptic number.

It is an amenable number.

56681705 is a deficient number, since it is larger than the sum of its proper divisors (12010399).

56681705 is a wasteful number, since it uses less digits than its factorization.

56681705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112347.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 56681705 is about 7528.7253237185. The cubic root of 56681705 is about 384.1324254820.

The spelling of 56681705 in words is "fifty-six million, six hundred eighty-one thousand, seven hundred five".