217008238293 has 120 divisors (see below), whose sum is σ = 413347914144. Its totient is φ = 112192516800.

The previous prime is 217008238267. The next prime is 217008238309. The reversal of 217008238293 is 392832800712.

It is not a de Polignac number, because 217008238293 - 2⁵ = 217008238261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217008238253) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 9200271 + ... + 9223827.

Almost surely, 2^217008238293 is an apocalyptic number.

It is an amenable number.

217008238293 is a deficient number, since it is larger than the sum of its proper divisors (196339675851).

217008238293 is a wasteful number, since it uses less digits than its factorization.

217008238293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23805 (or 23789 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 217008238293 in words is "two hundred seventeen billion, eight million, two hundred thirty-eight thousand, two hundred ninety-three".