243305502241 has 2 divisors, whose sum is σ = 243305502242. Its totient is φ = 243305502240.

The previous prime is 243305502229. The next prime is 243305502247. The reversal of 243305502241 is 142205503342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219847516641 + 23457985600 = 468879^2 + 153160^2 .

It is a cyclic number.

It is not a de Polignac number, because 243305502241 - 2²⁷ = 243171284513 is a prime.

It is not a weakly prime, because it can be changed into another prime (243305502247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121652751120 + 121652751121.

It is an arithmetic number, because the mean of its divisors is an integer number (121652751121).

Almost surely, 2^243305502241 is an apocalyptic number.

It is an amenable number.

243305502241 is a deficient number, since it is larger than the sum of its proper divisors (1).

243305502241 is an equidigital number, since it uses as much as digits as its factorization.

243305502241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 31.

The spelling of 243305502241 in words is "two hundred forty-three billion, three hundred five million, five hundred two thousand, two hundred forty-one".