304243231 has 2 divisors, whose sum is σ = 304243232. Its totient is φ = 304243230.

The previous prime is 304243229. The next prime is 304243253. The reversal of 304243231 is 132342403.

It is a happy number.

It is an a-pointer prime, because the next prime (304243253) can be obtained adding 304243231 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 304243231 - 2¹ = 304243229 is a prime.

It is a super-2 number, since 2×304243231² = 185127887218638722, which contains 22 as substring.

Together with 304243229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304243211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152121615 + 152121616.

It is an arithmetic number, because the mean of its divisors is an integer number (152121616).

Almost surely, 2^304243231 is an apocalyptic number.

304243231 is a deficient number, since it is larger than the sum of its proper divisors (1).

304243231 is an equidigital number, since it uses as much as digits as its factorization.

304243231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 304243231 is about 17442.5695068129. The cubic root of 304243231 is about 672.5743617647.

Adding to 304243231 its reverse (132342403), we get a palindrome (436585634).

The spelling of 304243231 in words is "three hundred four million, two hundred forty-three thousand, two hundred thirty-one".