12216238 has 8 divisors (see below), whose sum is σ = 18396432. Its totient is φ = 6084096.

The previous prime is 12216227. The next prime is 12216247. The reversal of 12216238 is 83261221.

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, 11370 + ... + 12397.

It is an arithmetic number, because the mean of its divisors is an integer number (2299554).

Almost surely, 2^12216238 is an apocalyptic number.

12216238 is a deficient number, since it is larger than the sum of its proper divisors (6180194).

12216238 is a wasteful number, since it uses less digits than its factorization.

12216238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24026.

The product of its digits is 1152, while the sum is 25.

The square root of 12216238 is about 3495.1735293115. The cubic root of 12216238 is about 230.3098407647.

Adding to 12216238 its reverse (83261221), we get a palindrome (95477459).

The spelling of 12216238 in words is "twelve million, two hundred sixteen thousand, two hundred thirty-eight".