57216317 has 2 divisors, whose sum is σ = 57216318. Its totient is φ = 57216316.

The previous prime is 57216283. The next prime is 57216347. The reversal of 57216317 is 71361275.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34739236 + 22477081 = 5894^2 + 4741^2 .

It is a cyclic number.

It is not a de Polignac number, because 57216317 - 2¹⁰ = 57215293 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57216347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28608158 + 28608159.

It is an arithmetic number, because the mean of its divisors is an integer number (28608159).

Almost surely, 2^57216317 is an apocalyptic number.

It is an amenable number.

57216317 is a deficient number, since it is larger than the sum of its proper divisors (1).

57216317 is an equidigital number, since it uses as much as digits as its factorization.

57216317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8820, while the sum is 32.

The square root of 57216317 is about 7564.1468124303. The cubic root of 57216317 is about 385.3363384590.

The spelling of 57216317 in words is "fifty-seven million, two hundred sixteen thousand, three hundred seventeen".