216854334 has 80 divisors (see below), whose sum is σ = 522720000. Its totient is φ = 66978576.

The previous prime is 216854303. The next prime is 216854357. The reversal of 216854334 is 433458612.

216854334 is a `hidden beast` number, since 21 + 68 + 543 + 34 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 143917 + ... + 145415.

It is an arithmetic number, because the mean of its divisors is an integer number (6534000).

Almost surely, 2^216854334 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216854334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261360000).

216854334 is an abundant number, since it is smaller than the sum of its proper divisors (305865666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216854334 is a wasteful number, since it uses less digits than its factorization.

216854334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579 (or 1570 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 216854334 is about 14725.9748064432. The cubic root of 216854334 is about 600.7900093522.

The spelling of 216854334 in words is "two hundred sixteen million, eight hundred fifty-four thousand, three hundred thirty-four".