56817317 has 2 divisors, whose sum is σ = 56817318. Its totient is φ = 56817316.

The previous prime is 56817307. The next prime is 56817323. The reversal of 56817317 is 71371865.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30459361 + 26357956 = 5519^2 + 5134^2 .

It is a cyclic number.

It is not a de Polignac number, because 56817317 - 2⁴ = 56817301 is a prime.

It is a super-2 number, since 2×56817317² = 6456415022156978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56817307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28408658 + 28408659.

It is an arithmetic number, because the mean of its divisors is an integer number (28408659).

Almost surely, 2^56817317 is an apocalyptic number.

It is an amenable number.

56817317 is a deficient number, since it is larger than the sum of its proper divisors (1).

56817317 is an equidigital number, since it uses as much as digits as its factorization.

56817317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 38.

The square root of 56817317 is about 7537.7262486774. The cubic root of 56817317 is about 384.4385294072.

The spelling of 56817317 in words is "fifty-six million, eight hundred seventeen thousand, three hundred seventeen".