217285488587 has 2 divisors, whose sum is σ = 217285488588. Its totient is φ = 217285488586.

The previous prime is 217285488521. The next prime is 217285488647. The reversal of 217285488587 is 785884582712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 217285488587 - 2¹⁶ = 217285423051 is a prime.

It is not a weakly prime, because it can be changed into another prime (217285481587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108642744293 + 108642744294.

It is an arithmetic number, because the mean of its divisors is an integer number (108642744294).

Almost surely, 2^217285488587 is an apocalyptic number.

217285488587 is a deficient number, since it is larger than the sum of its proper divisors (1).

217285488587 is an equidigital number, since it uses as much as digits as its factorization.

217285488587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80281600, while the sum is 65.

The spelling of 217285488587 in words is "two hundred seventeen billion, two hundred eighty-five million, four hundred eighty-eight thousand, five hundred eighty-seven".