217299117 has 64 divisors (see below), whose sum is σ = 367718400. Its totient is φ = 111283200.

The previous prime is 217299097. The next prime is 217299133. The reversal of 217299117 is 711992712.

It is not a de Polignac number, because 217299117 - 2⁶ = 217299053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217259117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1438992 + ... + 1439142.

It is an arithmetic number, because the mean of its divisors is an integer number (5745600).

Almost surely, 2^217299117 is an apocalyptic number.

It is an amenable number.

217299117 is a deficient number, since it is larger than the sum of its proper divisors (150419283).

217299117 is a wasteful number, since it uses less digits than its factorization.

217299117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346.

The product of its digits is 15876, while the sum is 39.

The square root of 217299117 is about 14741.0690589251. The cubic root of 217299117 is about 601.2004825785.

The spelling of 217299117 in words is "two hundred seventeen million, two hundred ninety-nine thousand, one hundred seventeen".