12224431 has 4 divisors (see below), whose sum is σ = 12755952. Its totient is φ = 11692912.

The previous prime is 12224413. The next prime is 12224473. The reversal of 12224431 is 13442221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12224431 - 2²¹ = 10127279 is a prime.

It is a super-2 number, since 2×12224431² = 298873426547522, 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 = 12224399 and 12224408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12224731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265726 + ... + 265771.

It is an arithmetic number, because the mean of its divisors is an integer number (3188988).

Almost surely, 2^12224431 is an apocalyptic number.

12224431 is a deficient number, since it is larger than the sum of its proper divisors (531521).

12224431 is an equidigital number, since it uses as much as digits as its factorization.

12224431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531520.

The product of its digits is 384, while the sum is 19.

The square root of 12224431 is about 3496.3453776765. The cubic root of 12224431 is about 230.3613161548.

Adding to 12224431 its reverse (13442221), we get a palindrome (25666652).

The spelling of 12224431 in words is "twelve million, two hundred twenty-four thousand, four hundred thirty-one".