242220882457 has 2 divisors, whose sum is σ = 242220882458. Its totient is φ = 242220882456.

The previous prime is 242220882427. The next prime is 242220882521. The reversal of 242220882457 is 754288022242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146551918041 + 95668964416 = 382821^2 + 309304^2 .

It is a cyclic number.

It is not a de Polignac number, because 242220882457 - 2¹⁹ = 242220358169 is a prime.

It is not a weakly prime, because it can be changed into another prime (242220882427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121110441228 + 121110441229.

It is an arithmetic number, because the mean of its divisors is an integer number (121110441229).

Almost surely, 2^242220882457 is an apocalyptic number.

It is an amenable number.

242220882457 is a deficient number, since it is larger than the sum of its proper divisors (1).

242220882457 is an equidigital number, since it uses as much as digits as its factorization.

242220882457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1146880, while the sum is 46.

The spelling of 242220882457 in words is "two hundred forty-two billion, two hundred twenty million, eight hundred eighty-two thousand, four hundred fifty-seven".