217070017 has 16 divisors (see below), whose sum is σ = 232853760. Its totient is φ = 201979008.

The previous prime is 217070011. The next prime is 217070039. The reversal of 217070017 is 710070712.

It is a cyclic number.

It is not a de Polignac number, because 217070017 - 2¹⁹ = 216545729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 217069973 and 217070000.

It is not an unprimeable number, because it can be changed into a prime (217070011) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 90133 + ... + 92509.

It is an arithmetic number, because the mean of its divisors is an integer number (14553360).

Almost surely, 2^217070017 is an apocalyptic number.

It is an amenable number.

217070017 is a deficient number, since it is larger than the sum of its proper divisors (15783743).

217070017 is a wasteful number, since it uses less digits than its factorization.

217070017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2520.

The product of its (nonzero) digits is 686, while the sum is 25.

The square root of 217070017 is about 14733.2962028190. The cubic root of 217070017 is about 600.9891249718.

The spelling of 217070017 in words is "two hundred seventeen million, seventy thousand, seventeen".