216854338 has 4 divisors (see below), whose sum is σ = 325281510. Its totient is φ = 108427168.

The previous prime is 216854303. The next prime is 216854357. The reversal of 216854338 is 833458612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 204861969 + 11992369 = 14313^2 + 3463^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 216854338.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54213583 + ... + 54213586.

Almost surely, 2^216854338 is an apocalyptic number.

216854338 is a deficient number, since it is larger than the sum of its proper divisors (108427172).

216854338 is a wasteful number, since it uses less digits than its factorization.

216854338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108427171.

The product of its digits is 138240, while the sum is 40.

The square root of 216854338 is about 14725.9749422576. The cubic root of 216854338 is about 600.7900130461.

The spelling of 216854338 in words is "two hundred sixteen million, eight hundred fifty-four thousand, three hundred thirty-eight".