12816227 has 4 divisors (see below), whose sum is σ = 12827976. Its totient is φ = 12804480.

The previous prime is 12816211. The next prime is 12816247. The reversal of 12816227 is 72261821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72261821 = 277 ⋅260873.

It is a cyclic number.

It is not a de Polignac number, because 12816227 - 2⁴ = 12816211 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 12816227.

It is not an unprimeable number, because it can be changed into a prime (12816247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4049 + ... + 6482.

It is an arithmetic number, because the mean of its divisors is an integer number (3206994).

Almost surely, 2^12816227 is an apocalyptic number.

12816227 is a deficient number, since it is larger than the sum of its proper divisors (11749).

12816227 is a wasteful number, since it uses less digits than its factorization.

12816227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11748.

The product of its digits is 2688, while the sum is 29.

The square root of 12816227 is about 3579.9758379073. The cubic root of 12816227 is about 234.0202273892.

The spelling of 12816227 in words is "twelve million, eight hundred sixteen thousand, two hundred twenty-seven".