243053515139 has 2 divisors, whose sum is σ = 243053515140. Its totient is φ = 243053515138.

The previous prime is 243053515129. The next prime is 243053515181. The reversal of 243053515139 is 931515350342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243053515139 - 2⁴ = 243053515123 is a prime.

It is a super-2 number, since 2×243053515139² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243053515096 and 243053515105.

It is not a weakly prime, because it can be changed into another prime (243053515129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121526757569 + 121526757570.

It is an arithmetic number, because the mean of its divisors is an integer number (121526757570).

Almost surely, 2^243053515139 is an apocalyptic number.

243053515139 is a deficient number, since it is larger than the sum of its proper divisors (1).

243053515139 is an equidigital number, since it uses as much as digits as its factorization.

243053515139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243000, while the sum is 41.

The spelling of 243053515139 in words is "two hundred forty-three billion, fifty-three million, five hundred fifteen thousand, one hundred thirty-nine".