231430547 has 2 divisors, whose sum is σ = 231430548. Its totient is φ = 231430546.

The previous prime is 231430541. The next prime is 231430559. The reversal of 231430547 is 745034132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231430547 - 2⁶ = 231430483 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231430541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115715273 + 115715274.

It is an arithmetic number, because the mean of its divisors is an integer number (115715274).

Almost surely, 2^231430547 is an apocalyptic number.

231430547 is a deficient number, since it is larger than the sum of its proper divisors (1).

231430547 is an equidigital number, since it uses as much as digits as its factorization.

231430547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 231430547 is about 15212.8415162980. The cubic root of 231430547 is about 613.9602118537.

Adding to 231430547 its reverse (745034132), we get a palindrome (976464679).

The spelling of 231430547 in words is "two hundred thirty-one million, four hundred thirty thousand, five hundred forty-seven".