56506717 has 2 divisors, whose sum is σ = 56506718. Its totient is φ = 56506716.

The previous prime is 56506693. The next prime is 56506739. The reversal of 56506717 is 71760565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46703556 + 9803161 = 6834^2 + 3131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56506717 is a prime.

It is a super-2 number, since 2×56506717² = 6386018132236178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56506757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28253358 + 28253359.

It is an arithmetic number, because the mean of its divisors is an integer number (28253359).

Almost surely, 2^56506717 is an apocalyptic number.

It is an amenable number.

56506717 is a deficient number, since it is larger than the sum of its proper divisors (1).

56506717 is an equidigital number, since it uses as much as digits as its factorization.

56506717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 56506717 is about 7517.0949841012. The cubic root of 56506717 is about 383.7367195763.

The spelling of 56506717 in words is "fifty-six million, five hundred six thousand, seven hundred seventeen".