242308595566981 has 2 divisors, whose sum is σ = 242308595566982. Its totient is φ = 242308595566980.

The previous prime is 242308595566967. The next prime is 242308595566993. The reversal of 242308595566981 is 189665595803242.

242308595566981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229719340685025 + 12589254881956 = 15156495^2 + 3548134^2 .

It is a cyclic number.

It is not a de Polignac number, because 242308595566981 - 2⁹ = 242308595566469 is a prime.

It is a super-2 number, since 2×242308595566981² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242308595566381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121154297783490 + 121154297783491.

It is an arithmetic number, because the mean of its divisors is an integer number (121154297783491).

Almost surely, 2^{242308595566981} is an apocalyptic number.

It is an amenable number.

242308595566981 is a deficient number, since it is larger than the sum of its proper divisors (1).

242308595566981 is an equidigital number, since it uses as much as digits as its factorization.

242308595566981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744000, while the sum is 73.

The spelling of 242308595566981 in words is "two hundred forty-two trillion, three hundred eight billion, five hundred ninety-five million, five hundred sixty-six thousand, nine hundred eighty-one".