217160864 has 12 divisors (see below), whose sum is σ = 427535514. Its totient is φ = 108580416.

The previous prime is 217160857. The next prime is 217160891. The reversal of 217160864 is 468061712.

It can be written as a sum of positive squares in only one way, i.e., 141610000 + 75550864 = 11900^2 + 8692^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3393107 + ... + 3393170.

Almost surely, 2^217160864 is an apocalyptic number.

It is an amenable number.

217160864 is a deficient number, since it is larger than the sum of its proper divisors (210374650).

217160864 is an equidigital number, since it uses as much as digits as its factorization.

217160864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6786287 (or 6786279 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 217160864 is about 14736.3789310672. The cubic root of 217160864 is about 601.0729542125.

The spelling of 217160864 in words is "two hundred seventeen million, one hundred sixty thousand, eight hundred sixty-four".