216304642 has 16 divisors (see below), whose sum is σ = 328550400. Its totient is φ = 106796448.

The previous prime is 216304637. The next prime is 216304657. The reversal of 216304642 is 246403612.

It is a self number, because there is not a number n which added to its sum of digits gives 216304642.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52543 + ... + 56509.

It is an arithmetic number, because the mean of its divisors is an integer number (20534400).

Almost surely, 2^216304642 is an apocalyptic number.

216304642 is a deficient number, since it is larger than the sum of its proper divisors (112245758).

216304642 is a wasteful number, since it uses less digits than its factorization.

216304642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4305.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 216304642 is about 14707.2989362425. The cubic root of 216304642 is about 600.2819434184.

The spelling of 216304642 in words is "two hundred sixteen million, three hundred four thousand, six hundred forty-two".