216382317 has 12 divisors (see below), whose sum is σ = 304495200. Its totient is φ = 136661832.

The previous prime is 216382301. The next prime is 216382319. The reversal of 216382317 is 713283612.

It is not a de Polignac number, because 216382317 - 2⁴ = 216382301 is a prime.

It is a super-2 number, since 2×216382317² = 93642614220576978, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216382319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98817 + ... + 100982.

It is an arithmetic number, because the mean of its divisors is an integer number (25374600).

Almost surely, 2^216382317 is an apocalyptic number.

It is an amenable number.

216382317 is a deficient number, since it is larger than the sum of its proper divisors (88112883).

216382317 is a wasteful number, since it uses less digits than its factorization.

216382317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199840 (or 199821 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 216382317 is about 14709.9393948446. The cubic root of 216382317 is about 600.3537885706.

The spelling of 216382317 in words is "two hundred sixteen million, three hundred eighty-two thousand, three hundred seventeen".