216346166 has 4 divisors (see below), whose sum is σ = 324519252. Its totient is φ = 108173082.

The previous prime is 216346121. The next prime is 216346171. The reversal of 216346166 is 661643612.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54086540 + ... + 54086543.

It is an arithmetic number, because the mean of its divisors is an integer number (81129813).

Almost surely, 2^216346166 is an apocalyptic number.

216346166 is a deficient number, since it is larger than the sum of its proper divisors (108173086).

216346166 is a wasteful number, since it uses less digits than its factorization.

216346166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108173085.

The product of its digits is 31104, while the sum is 35.

The square root of 216346166 is about 14708.7105485151. The cubic root of 216346166 is about 600.3203530002.

Adding to 216346166 its reverse (661643612), we get a palindrome (877989778).

The spelling of 216346166 in words is "two hundred sixteen million, three hundred forty-six thousand, one hundred sixty-six".