12813219 has 6 divisors (see below), whose sum is σ = 18507996. Its totient is φ = 8542140.

The previous prime is 12813217. The next prime is 12813253. The reversal of 12813219 is 91231821.

It is not a de Polignac number, because 12813219 - 2¹ = 12813217 is a prime.

It is a super-2 number, since 2×12813219² = 328357162283922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12813192 and 12813201.

It is not an unprimeable number, because it can be changed into a prime (12813217) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 711837 + ... + 711854.

It is an arithmetic number, because the mean of its divisors is an integer number (3084666).

Almost surely, 2^12813219 is an apocalyptic number.

12813219 is a deficient number, since it is larger than the sum of its proper divisors (5694777).

12813219 is a wasteful number, since it uses less digits than its factorization.

12813219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423697 (or 1423694 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 12813219 is about 3579.5556986866. Note that the first 3 decimals coincide. The cubic root of 12813219 is about 234.0019175824.

The spelling of 12813219 in words is "twelve million, eight hundred thirteen thousand, two hundred nineteen".