243223324291 has 2 divisors, whose sum is σ = 243223324292. Its totient is φ = 243223324290.

The previous prime is 243223324277. The next prime is 243223324313. The reversal of 243223324291 is 192423322342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243223324291 - 2⁷ = 243223324163 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243223324291.

It is not a weakly prime, because it can be changed into another prime (243223324391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121611662145 + 121611662146.

It is an arithmetic number, because the mean of its divisors is an integer number (121611662146).

Almost surely, 2^243223324291 is an apocalyptic number.

243223324291 is a deficient number, since it is larger than the sum of its proper divisors (1).

243223324291 is an equidigital number, since it uses as much as digits as its factorization.

243223324291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 37.

The spelling of 243223324291 in words is "two hundred forty-three billion, two hundred twenty-three million, three hundred twenty-four thousand, two hundred ninety-one".