243234534019 has 2 divisors, whose sum is σ = 243234534020. Its totient is φ = 243234534018.

The previous prime is 243234534007. The next prime is 243234534041. The reversal of 243234534019 is 910435432342.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243234534019 - 2¹³ = 243234525827 is a prime.

It is a super-2 number, since 2×243234534019² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243231534019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121617267009 + 121617267010.

It is an arithmetic number, because the mean of its divisors is an integer number (121617267010).

Almost surely, 2^243234534019 is an apocalyptic number.

243234534019 is a deficient number, since it is larger than the sum of its proper divisors (1).

243234534019 is an equidigital number, since it uses as much as digits as its factorization.

243234534019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 243234534019 in words is "two hundred forty-three billion, two hundred thirty-four million, five hundred thirty-four thousand, nineteen".