217316289 has 8 divisors (see below), whose sum is σ = 292319712. Its totient is φ = 143595200.

The previous prime is 217316279. The next prime is 217316339. The reversal of 217316289 is 982613712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 217316289 - 2⁴ = 217316273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (217316249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320187 + ... + 320864.

It is an arithmetic number, because the mean of its divisors is an integer number (36539964).

Almost surely, 2^217316289 is an apocalyptic number.

It is an amenable number.

217316289 is a deficient number, since it is larger than the sum of its proper divisors (75003423).

217316289 is a wasteful number, since it uses less digits than its factorization.

217316289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641167.

The product of its digits is 36288, while the sum is 39.

The square root of 217316289 is about 14741.6515017823. The cubic root of 217316289 is about 601.2163187262.

The spelling of 217316289 in words is "two hundred seventeen million, three hundred sixteen thousand, two hundred eighty-nine".