216678223 has 8 divisors (see below), whose sum is σ = 230832000. Its totient is φ = 202799448.

The previous prime is 216678211. The next prime is 216678263. The reversal of 216678223 is 322876612.

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 216678223 - 2²⁵ = 183123791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216678263) 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, 67123 + ... + 70276.

It is an arithmetic number, because the mean of its divisors is an integer number (28854000).

Almost surely, 2^216678223 is an apocalyptic number.

216678223 is a deficient number, since it is larger than the sum of its proper divisors (14153777).

216678223 is a wasteful number, since it uses less digits than its factorization.

216678223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137501.

The product of its digits is 48384, while the sum is 37.

The square root of 216678223 is about 14719.9939877705. The cubic root of 216678223 is about 600.6273281297.

It can be divided in two parts, 21667 and 8223, that added together give a triangular number (29890 = T₂₄₄).

The spelling of 216678223 in words is "two hundred sixteen million, six hundred seventy-eight thousand, two hundred twenty-three".