243222143 has 2 divisors, whose sum is σ = 243222144. Its totient is φ = 243222142.

The previous prime is 243222103. The next prime is 243222151. The reversal of 243222143 is 341222342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243222143 - 2¹⁶ = 243156607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243222103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121611071 + 121611072.

It is an arithmetic number, because the mean of its divisors is an integer number (121611072).

Almost surely, 2^243222143 is an apocalyptic number.

243222143 is a deficient number, since it is larger than the sum of its proper divisors (1).

243222143 is an equidigital number, since it uses as much as digits as its factorization.

243222143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 23.

The square root of 243222143 is about 15595.5808804930. The cubic root of 243222143 is about 624.2152437580.

Adding to 243222143 its reverse (341222342), we get a palindrome (584444485).

The spelling of 243222143 in words is "two hundred forty-three million, two hundred twenty-two thousand, one hundred forty-three".