12222215 has 8 divisors (see below), whose sum is σ = 15139968. Its totient is φ = 9462240.

The previous prime is 12222211. The next prime is 12222241. The reversal of 12222215 is 51222221.

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

It is not a de Polignac number, because 12222215 - 2² = 12222211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12222193 and 12222202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39272 + ... + 39581.

It is an arithmetic number, because the mean of its divisors is an integer number (1892496).

Almost surely, 2^12222215 is an apocalyptic number.

12222215 is a deficient number, since it is larger than the sum of its proper divisors (2917753).

12222215 is an equidigital number, since it uses as much as digits as its factorization.

12222215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78889.

The product of its digits is 160, while the sum is 17.

The square root of 12222215 is about 3496.0284609825. The cubic root of 12222215 is about 230.3473956289.

Adding to 12222215 its reverse (51222221), we get a palindrome (63444436).

The spelling of 12222215 in words is "twelve million, two hundred twenty-two thousand, two hundred fifteen".