216301684 has 24 divisors (see below), whose sum is σ = 387676800. Its totient is φ = 105568320.

The previous prime is 216301651. The next prime is 216301733. The reversal of 216301684 is 486103612.

It is a happy number.

It is a super-3 number, since 3×216301684³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

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, 24279 + ... + 31969.

It is an arithmetic number, because the mean of its divisors is an integer number (16153200).

Almost surely, 2^216301684 is an apocalyptic number.

It is an amenable number.

216301684 is a deficient number, since it is larger than the sum of its proper divisors (171375116).

216301684 is a wasteful number, since it uses less digits than its factorization.

216301684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7863 (or 7861 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 216301684 is about 14707.1983735856. The cubic root of 216301684 is about 600.2792070892.

The spelling of 216301684 in words is "two hundred sixteen million, three hundred one thousand, six hundred eighty-four".