242655510257 has 2 divisors, whose sum is σ = 242655510258. Its totient is φ = 242655510256.

The previous prime is 242655510191. The next prime is 242655510269. The reversal of 242655510257 is 752015556242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191017947136 + 51637563121 = 437056^2 + 227239^2 .

It is a cyclic number.

It is not a de Polignac number, because 242655510257 - 2¹⁰ = 242655509233 is a prime.

It is not a weakly prime, because it can be changed into another prime (242655510857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121327755128 + 121327755129.

It is an arithmetic number, because the mean of its divisors is an integer number (121327755129).

Almost surely, 2^242655510257 is an apocalyptic number.

It is an amenable number.

242655510257 is a deficient number, since it is larger than the sum of its proper divisors (1).

242655510257 is an equidigital number, since it uses as much as digits as its factorization.

242655510257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840000, while the sum is 44.

The spelling of 242655510257 in words is "two hundred forty-two billion, six hundred fifty-five million, five hundred ten thousand, two hundred fifty-seven".