216859682 has 16 divisors (see below), whose sum is σ = 353590272. Its totient is φ = 99152400.

The previous prime is 216859679. The next prime is 216859691. The reversal of 216859682 is 286958612.

It is a super-2 number, since 2×216859682² = 94056243354282248, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36194 + ... + 41757.

It is an arithmetic number, because the mean of its divisors is an integer number (22099392).

Almost surely, 2^216859682 is an apocalyptic number.

216859682 is a deficient number, since it is larger than the sum of its proper divisors (136730590).

216859682 is a wasteful number, since it uses less digits than its factorization.

216859682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78073.

The product of its digits is 414720, while the sum is 47.

The square root of 216859682 is about 14726.1563892280. The cubic root of 216859682 is about 600.7949481491.

The spelling of 216859682 in words is "two hundred sixteen million, eight hundred fifty-nine thousand, six hundred eighty-two".