241531345656509 has 2 divisors, whose sum is σ = 241531345656510. Its totient is φ = 241531345656508.

The previous prime is 241531345656499. The next prime is 241531345656533. The reversal of 241531345656509 is 905656543135142.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153877748134009 + 87653597522500 = 12404747^2 + 9362350^2 .

It is a cyclic number.

It is not a de Polignac number, because 241531345656509 - 2²⁴ = 241531328879293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (241531345656599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120765672828254 + 120765672828255.

It is an arithmetic number, because the mean of its divisors is an integer number (120765672828255).

Almost surely, 2^{241531345656509} is an apocalyptic number.

It is an amenable number.

241531345656509 is a deficient number, since it is larger than the sum of its proper divisors (1).

241531345656509 is an equidigital number, since it uses as much as digits as its factorization.

241531345656509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320000, while the sum is 59.

The spelling of 241531345656509 in words is "two hundred forty-one trillion, five hundred thirty-one billion, three hundred forty-five million, six hundred fifty-six thousand, five hundred nine".