12831219 has 24 divisors (see below), whose sum is σ = 19066320. Its totient is φ = 8312832.

The previous prime is 12831211. The next prime is 12831223. The reversal of 12831219 is 91213821.

It is not a de Polignac number, because 12831219 - 2³ = 12831211 is a prime.

It is a super-2 number, since 2×12831219² = 329280362051922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12831192 and 12831201.

It is not an unprimeable number, because it can be changed into a prime (12831211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66387 + ... + 66579.

It is an arithmetic number, because the mean of its divisors is an integer number (794430).

Almost surely, 2^12831219 is an apocalyptic number.

12831219 is a deficient number, since it is larger than the sum of its proper divisors (6235101).

12831219 is a wasteful number, since it uses less digits than its factorization.

12831219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 368 counting only the distinct ones).

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

The square root of 12831219 is about 3582.0690948110. The cubic root of 12831219 is about 234.1114415487. Note that the first 3 decimals are identical.

The spelling of 12831219 in words is "twelve million, eight hundred thirty-one thousand, two hundred nineteen".