12213225 has 72 divisors (see below), whose sum is σ = 24141312. Its totient is φ = 5875200.

The previous prime is 12213221. The next prime is 12213241. The reversal of 12213225 is 52231221.

It is not a de Polignac number, because 12213225 - 2² = 12213221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12213198 and 12213207.

It is not an unprimeable number, because it can be changed into a prime (12213221) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 118524 + ... + 118626.

It is an arithmetic number, because the mean of its divisors is an integer number (335296).

Almost surely, 2^12213225 is an apocalyptic number.

12213225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12213225 is a deficient number, since it is larger than the sum of its proper divisors (11928087).

12213225 is a wasteful number, since it uses less digits than its factorization.

12213225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 159 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 12213225 is about 3494.7424797830. The cubic root of 12213225 is about 230.2909047494.

Adding to 12213225 its reverse (52231221), we get a palindrome (64444446).

The spelling of 12213225 in words is "twelve million, two hundred thirteen thousand, two hundred twenty-five".