216855338 has 16 divisors (see below), whose sum is σ = 372825600. Its totient is φ = 92669616.

The previous prime is 216855329. The next prime is 216855343. The reversal of 216855338 is 833558612.

It is a junction number, because it is equal to n+sod(n) for n = 216855295 and 216855304.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17306 + ... + 27077.

It is an arithmetic number, because the mean of its divisors is an integer number (23301600).

Almost surely, 2^216855338 is an apocalyptic number.

216855338 is a deficient number, since it is larger than the sum of its proper divisors (155970262).

216855338 is a wasteful number, since it uses less digits than its factorization.

216855338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44741.

The product of its digits is 172800, while the sum is 41.

The square root of 216855338 is about 14726.0088958278. The cubic root of 216855338 is about 600.7909365371.

The spelling of 216855338 in words is "two hundred sixteen million, eight hundred fifty-five thousand, three hundred thirty-eight".