216732212232166 has 8 divisors (see below), whose sum is σ = 325207815938280. Its totient is φ = 108329606919408.

The previous prime is 216732212232143. The next prime is 216732212232167. The reversal of 216732212232166 is 661232212237612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216732212232167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18249590916 + ... + 18249602791.

It is an arithmetic number, because the mean of its divisors is an integer number (40650976992285).

Almost surely, 2^{216732212232166} is an apocalyptic number.

216732212232166 is a deficient number, since it is larger than the sum of its proper divisors (108475603706114).

216732212232166 is a wasteful number, since it uses less digits than its factorization.

216732212232166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36499196678.

The product of its digits is 870912, while the sum is 46.

Adding to 216732212232166 its reverse (661232212237612), we get a palindrome (877964424469778).

The spelling of 216732212232166 in words is "two hundred sixteen trillion, seven hundred thirty-two billion, two hundred twelve million, two hundred thirty-two thousand, one hundred sixty-six".