12167218 has 16 divisors (see below), whose sum is σ = 20913984. Its totient is φ = 5200560.

The previous prime is 12167213. The next prime is 12167227. The reversal of 12167218 is 81276121.

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

It is not an unprimeable number, because it can be changed into a prime (12167213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5608 + ... + 7468.

It is an arithmetic number, because the mean of its divisors is an integer number (1307124).

Almost surely, 2^12167218 is an apocalyptic number.

12167218 is a deficient number, since it is larger than the sum of its proper divisors (8746766).

12167218 is a wasteful number, since it uses less digits than its factorization.

12167218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337.

The product of its digits is 1344, while the sum is 28.

The square root of 12167218 is about 3488.1539530244. The cubic root of 12167218 is about 230.0013736528.

The spelling of 12167218 in words is "twelve million, one hundred sixty-seven thousand, two hundred eighteen".