243231534019 has 2 divisors, whose sum is σ = 243231534020. Its totient is φ = 243231534018.

The previous prime is 243231533899. The next prime is 243231534023. The reversal of 243231534019 is 910435132342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243231534019 - 2¹¹ = 243231531971 is a prime.

It is a super-2 number, since 2×243231534019² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243231534059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121615767009 + 121615767010.

It is an arithmetic number, because the mean of its divisors is an integer number (121615767010).

Almost surely, 2^243231534019 is an apocalyptic number.

243231534019 is a deficient number, since it is larger than the sum of its proper divisors (1).

243231534019 is an equidigital number, since it uses as much as digits as its factorization.

243231534019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 243231534019 in words is "two hundred forty-three billion, two hundred thirty-one million, five hundred thirty-four thousand, nineteen".