243115400141 has 2 divisors, whose sum is σ = 243115400142. Its totient is φ = 243115400140.

The previous prime is 243115400137. The next prime is 243115400159. The reversal of 243115400141 is 141004511342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241478874025 + 1636526116 = 491405^2 + 40454^2 .

It is a cyclic number.

It is not a de Polignac number, because 243115400141 - 2² = 243115400137 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 243115400141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243115400041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121557700070 + 121557700071.

It is an arithmetic number, because the mean of its divisors is an integer number (121557700071).

Almost surely, 2^243115400141 is an apocalyptic number.

It is an amenable number.

243115400141 is a deficient number, since it is larger than the sum of its proper divisors (1).

243115400141 is an equidigital number, since it uses as much as digits as its factorization.

243115400141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 243115400141 its reverse (141004511342), we get a palindrome (384119911483).

The spelling of 243115400141 in words is "two hundred forty-three billion, one hundred fifteen million, four hundred thousand, one hundred forty-one".