243340402171 has 2 divisors, whose sum is σ = 243340402172. Its totient is φ = 243340402170.

The previous prime is 243340402159. The next prime is 243340402243. The reversal of 243340402171 is 171204043342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243340402171 - 2³⁵ = 208980663803 is a prime.

It is not a weakly prime, because it can be changed into another prime (243340402111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121670201085 + 121670201086.

It is an arithmetic number, because the mean of its divisors is an integer number (121670201086).

Almost surely, 2^243340402171 is an apocalyptic number.

243340402171 is a deficient number, since it is larger than the sum of its proper divisors (1).

243340402171 is an equidigital number, since it uses as much as digits as its factorization.

243340402171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 31.

The spelling of 243340402171 in words is "two hundred forty-three billion, three hundred forty million, four hundred two thousand, one hundred seventy-one".