241538605261 has 2 divisors, whose sum is σ = 241538605262. Its totient is φ = 241538605260.

The previous prime is 241538605219. The next prime is 241538605271. The reversal of 241538605261 is 162506835142.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183809412900 + 57729192361 = 428730^2 + 240269^2 .

It is a cyclic number.

It is not a de Polignac number, because 241538605261 - 2¹⁷ = 241538474189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (241538605271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120769302630 + 120769302631.

It is an arithmetic number, because the mean of its divisors is an integer number (120769302631).

Almost surely, 2^241538605261 is an apocalyptic number.

It is an amenable number.

241538605261 is a deficient number, since it is larger than the sum of its proper divisors (1).

241538605261 is an equidigital number, since it uses as much as digits as its factorization.

241538605261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 241538605261 in words is "two hundred forty-one billion, five hundred thirty-eight million, six hundred five thousand, two hundred sixty-one".