243331147 has 2 divisors, whose sum is σ = 243331148. Its totient is φ = 243331146.

The previous prime is 243331097. The next prime is 243331159. The reversal of 243331147 is 741133342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243331147 - 2¹⁹ = 242806859 is a prime.

It is not a weakly prime, because it can be changed into another prime (243331447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121665573 + 121665574.

It is an arithmetic number, because the mean of its divisors is an integer number (121665574).

Almost surely, 2^243331147 is an apocalyptic number.

243331147 is a deficient number, since it is larger than the sum of its proper divisors (1).

243331147 is an equidigital number, since it uses as much as digits as its factorization.

243331147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 28.

The square root of 243331147 is about 15599.0751969468. The cubic root of 243331147 is about 624.3084806037.

Adding to 243331147 its reverse (741133342), we get a palindrome (984464489).

The spelling of 243331147 in words is "two hundred forty-three million, three hundred thirty-one thousand, one hundred forty-seven".