216338319 has 6 divisors (see below), whose sum is σ = 312488696. Its totient is φ = 144225540.

The previous prime is 216338293. The next prime is 216338329. The reversal of 216338319 is 913833612.

216338319 is a `hidden beast` number, since 2 + 1 + 6 + 338 + 319 = 666.

It is not a de Polignac number, because 216338319 - 2⁸ = 216338063 is a prime.

It is a super-2 number, since 2×216338319² = 93604536535491522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216338329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12018787 + ... + 12018804.

Almost surely, 2^216338319 is an apocalyptic number.

216338319 is a deficient number, since it is larger than the sum of its proper divisors (96150377).

216338319 is a wasteful number, since it uses less digits than its factorization.

216338319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24037597 (or 24037594 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 216338319 is about 14708.4437993963. The cubic root of 216338319 is about 600.3130949242.

The spelling of 216338319 in words is "two hundred sixteen million, three hundred thirty-eight thousand, three hundred nineteen".