243211147 has 2 divisors, whose sum is σ = 243211148. Its totient is φ = 243211146.

The previous prime is 243211141. The next prime is 243211181. The reversal of 243211147 is 741112342.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243211147 is a prime.

It is not a weakly prime, because it can be changed into another prime (243211141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121605573 + 121605574.

It is an arithmetic number, because the mean of its divisors is an integer number (121605574).

Almost surely, 2^243211147 is an apocalyptic number.

243211147 is a deficient number, since it is larger than the sum of its proper divisors (1).

243211147 is an equidigital number, since it uses as much as digits as its factorization.

243211147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 25.

The square root of 243211147 is about 15595.2283407458. The cubic root of 243211147 is about 624.2058367550.

Adding to 243211147 its reverse (741112342), we get a palindrome (984323489).

The spelling of 243211147 in words is "two hundred forty-three million, two hundred eleven thousand, one hundred forty-seven".