231840307 has 2 divisors, whose sum is σ = 231840308. Its totient is φ = 231840306.

The previous prime is 231840269. The next prime is 231840341. The reversal of 231840307 is 703048132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231840307 - 2²⁷ = 97622579 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231840377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115920153 + 115920154.

It is an arithmetic number, because the mean of its divisors is an integer number (115920154).

Almost surely, 2^231840307 is an apocalyptic number.

231840307 is a deficient number, since it is larger than the sum of its proper divisors (1).

231840307 is an equidigital number, since it uses as much as digits as its factorization.

231840307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 231840307 is about 15226.3031297817. The cubic root of 231840307 is about 614.3223478655.

Adding to 231840307 its reverse (703048132), we get a palindrome (934888439).

The spelling of 231840307 in words is "two hundred thirty-one million, eight hundred forty thousand, three hundred seven".