217105068 has 12 divisors (see below), whose sum is σ = 506578520. Its totient is φ = 72368352.

The previous prime is 217105051. The next prime is 217105081. The reversal of 217105068 is 860501712.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×217105068² = 94269221102569248, which contains 22 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 9046033 + ... + 9046056.

Almost surely, 2^217105068 is an apocalyptic number.

It is an amenable number.

217105068 is an abundant number, since it is smaller than the sum of its proper divisors (289473452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217105068 is a wasteful number, since it uses less digits than its factorization.

217105068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18092096 (or 18092094 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 217105068 is about 14734.4856713765. The cubic root of 217105068 is about 601.0214711188.

The spelling of 217105068 in words is "two hundred seventeen million, one hundred five thousand, sixty-eight".