216570000217 has 2 divisors, whose sum is σ = 216570000218. Its totient is φ = 216570000216.

The previous prime is 216570000181. The next prime is 216570000223. The reversal of 216570000217 is 712000075612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124408576656 + 92161423561 = 352716^2 + 303581^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216570000217 is a prime.

It is not a weakly prime, because it can be changed into another prime (216570000817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108285000108 + 108285000109.

It is an arithmetic number, because the mean of its divisors is an integer number (108285000109).

Almost surely, 2^216570000217 is an apocalyptic number.

It is an amenable number.

216570000217 is a deficient number, since it is larger than the sum of its proper divisors (1).

216570000217 is an equidigital number, since it uses as much as digits as its factorization.

216570000217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 31.

Adding to 216570000217 its reverse (712000075612), we get a palindrome (928570075829).

The spelling of 216570000217 in words is "two hundred sixteen billion, five hundred seventy million, two hundred seventeen", and thus it is an aban number.