12302231 has 4 divisors (see below), whose sum is σ = 12309264. Its totient is φ = 12295200.

The previous prime is 12302221. The next prime is 12302233. The reversal of 12302231 is 13220321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 13220321 = 1297 ⋅10193.

It is a cyclic number.

It is not a de Polignac number, because 12302231 - 2¹⁸ = 12040087 is a prime.

It is a super-2 number, since 2×12302231² = 302689775154722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12302233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1391 + ... + 5151.

It is an arithmetic number, because the mean of its divisors is an integer number (3077316).

Almost surely, 2^12302231 is an apocalyptic number.

12302231 is a deficient number, since it is larger than the sum of its proper divisors (7033).

12302231 is an equidigital number, since it uses as much as digits as its factorization.

12302231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7032.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 12302231 is about 3507.4536347613. The cubic root of 12302231 is about 230.8489795798.

Adding to 12302231 its reverse (13220321), we get a palindrome (25522552).

The spelling of 12302231 in words is "twelve million, three hundred two thousand, two hundred thirty-one".