12217166 has 8 divisors (see below), whose sum is σ = 19735464. Its totient is φ = 5638680.

The previous prime is 12217159. The next prime is 12217199. The reversal of 12217166 is 66171221.

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 469891 = 12217166 / (1 + 2 + 2 + 1 + 7 + 1 + 6 + 6).

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, 234920 + ... + 234971.

It is an arithmetic number, because the mean of its divisors is an integer number (2466933).

Almost surely, 2^12217166 is an apocalyptic number.

12217166 is a deficient number, since it is larger than the sum of its proper divisors (7518298).

12217166 is a wasteful number, since it uses less digits than its factorization.

12217166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469906.

The product of its digits is 1008, while the sum is 26.

The square root of 12217166 is about 3495.3062812864. The cubic root of 12217166 is about 230.3156724051.

Adding to 12217166 its reverse (66171221), we get a palindrome (78388387).

The spelling of 12217166 in words is "twelve million, two hundred seventeen thousand, one hundred sixty-six".