242515705517 has 2 divisors, whose sum is σ = 242515705518. Its totient is φ = 242515705516.

The previous prime is 242515705501. The next prime is 242515705541. The reversal of 242515705517 is 715507515242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149884348201 + 92631357316 = 387149^2 + 304354^2 .

It is a cyclic number.

It is not a de Polignac number, because 242515705517 - 2⁴ = 242515705501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242515705567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121257852758 + 121257852759.

It is an arithmetic number, because the mean of its divisors is an integer number (121257852759).

Almost surely, 2^242515705517 is an apocalyptic number.

It is an amenable number.

242515705517 is a deficient number, since it is larger than the sum of its proper divisors (1).

242515705517 is an equidigital number, since it uses as much as digits as its factorization.

242515705517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 490000, while the sum is 44.

The spelling of 242515705517 in words is "two hundred forty-two billion, five hundred fifteen million, seven hundred five thousand, five hundred seventeen".