216441166 has 8 divisors (see below), whose sum is σ = 325869480. Its totient is φ = 107818008.

The previous prime is 216441149. The next prime is 216441187. The reversal of 216441166 is 661144612.

216441166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200616 + ... + 201691.

It is an arithmetic number, because the mean of its divisors is an integer number (40733685).

Almost surely, 2^216441166 is an apocalyptic number.

216441166 is a deficient number, since it is larger than the sum of its proper divisors (109428314).

216441166 is a wasteful number, since it uses less digits than its factorization.

216441166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402578.

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

The square root of 216441166 is about 14711.9395730135. The cubic root of 216441166 is about 600.4082092494.

Adding to 216441166 its reverse (661144612), we get a palindrome (877585778).

The spelling of 216441166 in words is "two hundred sixteen million, four hundred forty-one thousand, one hundred sixty-six".