242515704281 has 2 divisors, whose sum is σ = 242515704282. Its totient is φ = 242515704280.

The previous prime is 242515704251. The next prime is 242515704289. The reversal of 242515704281 is 182407515242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 236434200025 + 6081504256 = 486245^2 + 77984^2 .

It is a cyclic number.

It is not a de Polignac number, because 242515704281 - 2¹⁰ = 242515703257 is a prime.

It is a super-2 number, since 2×242515704281² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (242515704289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121257852140 + 121257852141.

It is an arithmetic number, because the mean of its divisors is an integer number (121257852141).

Almost surely, 2^242515704281 is an apocalyptic number.

It is an amenable number.

242515704281 is a deficient number, since it is larger than the sum of its proper divisors (1).

242515704281 is an equidigital number, since it uses as much as digits as its factorization.

242515704281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 179200, while the sum is 41.

The spelling of 242515704281 in words is "two hundred forty-two billion, five hundred fifteen million, seven hundred four thousand, two hundred eighty-one".