12225155 has 8 divisors (see below), whose sum is σ = 14889552. Its totient is φ = 9633888.

The previous prime is 12225149. The next prime is 12225179. The reversal of 12225155 is 55152221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12225155 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12225155.

It is an unprimeable number.

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, 17912 + ... + 18581.

It is an arithmetic number, because the mean of its divisors is an integer number (1861194).

Almost surely, 2^12225155 is an apocalyptic number.

12225155 is a deficient number, since it is larger than the sum of its proper divisors (2664397).

12225155 is an equidigital number, since it uses as much as digits as its factorization.

12225155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36565.

The product of its digits is 1000, while the sum is 23.

The square root of 12225155 is about 3496.4489128257. The cubic root of 12225155 is about 230.3658638321.

Adding to 12225155 its reverse (55152221), we get a palindrome (67377376).

The spelling of 12225155 in words is "twelve million, two hundred twenty-five thousand, one hundred fifty-five".