12305231 has 2 divisors, whose sum is σ = 12305232. Its totient is φ = 12305230.

The previous prime is 12305221. The next prime is 12305239. The reversal of 12305231 is 13250321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12305231 is a prime.

It is a super-2 number, since 2×12305231² = 302837419926722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12305239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6152615 + 6152616.

It is an arithmetic number, because the mean of its divisors is an integer number (6152616).

Almost surely, 2^12305231 is an apocalyptic number.

12305231 is a deficient number, since it is larger than the sum of its proper divisors (1).

12305231 is an equidigital number, since it uses as much as digits as its factorization.

12305231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 12305231 is about 3507.8812693704. The cubic root of 12305231 is about 230.8677428608.

Adding to 12305231 its reverse (13250321), we get a palindrome (25555552).

The spelling of 12305231 in words is "twelve million, three hundred five thousand, two hundred thirty-one".