216986735 has 16 divisors (see below), whose sum is σ = 298377216. Its totient is φ = 148393248.

The previous prime is 216986711. The next prime is 216986743. The reversal of 216986735 is 537689612.

It is a cyclic number.

It is not a de Polignac number, because 216986735 - 2¹² = 216982639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216986735.

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 15 ways as a sum of consecutive naturals, for example, 5312 + ... + 21498.

It is an arithmetic number, because the mean of its divisors is an integer number (18648576).

Almost surely, 2^216986735 is an apocalyptic number.

216986735 is a deficient number, since it is larger than the sum of its proper divisors (81390481).

216986735 is a wasteful number, since it uses less digits than its factorization.

216986735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16582.

The product of its digits is 544320, while the sum is 47.

The square root of 216986735 is about 14730.4696123376. The cubic root of 216986735 is about 600.9122557978.

The spelling of 216986735 in words is "two hundred sixteen million, nine hundred eighty-six thousand, seven hundred thirty-five".