56217717 has 6 divisors (see below), whose sum is σ = 81203382. Its totient is φ = 37478472.

The previous prime is 56217701. The next prime is 56217719. The reversal of 56217717 is 71771265.

It can be written as a sum of positive squares in only one way, i.e., 48566961 + 7650756 = 6969^2 + 2766^2 .

It is not a de Polignac number, because 56217717 - 2⁴ = 56217701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56217719) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3123198 + ... + 3123215.

It is an arithmetic number, because the mean of its divisors is an integer number (13533897).

Almost surely, 2^56217717 is an apocalyptic number.

It is an amenable number.

56217717 is a deficient number, since it is larger than the sum of its proper divisors (24985665).

56217717 is a wasteful number, since it uses less digits than its factorization.

56217717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6246419 (or 6246416 counting only the distinct ones).

The product of its digits is 20580, while the sum is 36.

The square root of 56217717 is about 7497.8474911137. The cubic root of 56217717 is about 383.0814021179.

The spelling of 56217717 in words is "fifty-six million, two hundred seventeen thousand, seven hundred seventeen".