216305654 has 16 divisors (see below), whose sum is σ = 344231856. Its totient is φ = 101587200.

The previous prime is 216305641. The next prime is 216305657. The reversal of 216305654 is 456503612.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 216305654.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216305657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11609 + ... + 23819.

It is an arithmetic number, because the mean of its divisors is an integer number (21514491).

Almost surely, 2^216305654 is an apocalyptic number.

216305654 is a deficient number, since it is larger than the sum of its proper divisors (127926202).

216305654 is a wasteful number, since it uses less digits than its factorization.

216305654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12751.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 216305654 is about 14707.3333408881. Note that the first 4 decimals coincide. The cubic root of 216305654 is about 600.2828795739.

The spelling of 216305654 in words is "two hundred sixteen million, three hundred five thousand, six hundred fifty-four".