12819231 has 6 divisors (see below), whose sum is σ = 18516680. Its totient is φ = 8546148.

The previous prime is 12819197. The next prime is 12819329. The reversal of 12819231 is 13291821.

It is a de Polignac number, because none of the positive numbers 2^k-12819231 is a prime.

It is a super-2 number, since 2×12819231² = 328665366862722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12819195 and 12819204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12811231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 712171 + ... + 712188.

Almost surely, 2^12819231 is an apocalyptic number.

12819231 is a deficient number, since it is larger than the sum of its proper divisors (5697449).

12819231 is a wasteful number, since it uses less digits than its factorization.

12819231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424365 (or 1424362 counting only the distinct ones).

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

The square root of 12819231 is about 3580.3953692295. The cubic root of 12819231 is about 234.0385099889.

The spelling of 12819231 in words is "twelve million, eight hundred nineteen thousand, two hundred thirty-one".