12218158 has 8 divisors (see below), whose sum is σ = 18404640. Its totient is φ = 6083280.

The previous prime is 12218153. The next prime is 12218179. The reversal of 12218158 is 85181221.

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 (12218153) 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, 12303 + ... + 13258.

It is an arithmetic number, because the mean of its divisors is an integer number (2300580).

Almost surely, 2^12218158 is an apocalyptic number.

12218158 is a deficient number, since it is larger than the sum of its proper divisors (6186482).

12218158 is a wasteful number, since it uses less digits than its factorization.

12218158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25802.

The product of its digits is 1280, while the sum is 28.

The square root of 12218158 is about 3495.4481829946. The cubic root of 12218158 is about 230.3219059010.

Adding to 12218158 its reverse (85181221), we get a palindrome (97399379).

The spelling of 12218158 in words is "twelve million, two hundred eighteen thousand, one hundred fifty-eight".