304321231 has 2 divisors, whose sum is σ = 304321232. Its totient is φ = 304321230.

The previous prime is 304321223. The next prime is 304321247. The reversal of 304321231 is 132123403.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 304321231 - 2³ = 304321223 is a prime.

It is a super-2 number, since 2×304321231² = 185222823274710722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 304321199 and 304321208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304331231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152160615 + 152160616.

It is an arithmetic number, because the mean of its divisors is an integer number (152160616).

Almost surely, 2^304321231 is an apocalyptic number.

304321231 is a deficient number, since it is larger than the sum of its proper divisors (1).

304321231 is an equidigital number, since it uses as much as digits as its factorization.

304321231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 304321231 is about 17444.8052726306. The cubic root of 304321231 is about 672.6318336734.

Adding to 304321231 its reverse (132123403), we get a palindrome (436444634).

The spelling of 304321231 in words is "three hundred four million, three hundred twenty-one thousand, two hundred thirty-one".