242202144257 has 2 divisors, whose sum is σ = 242202144258. Its totient is φ = 242202144256.

The previous prime is 242202144241. The next prime is 242202144319. The reversal of 242202144257 is 752441202242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149800735681 + 92401408576 = 387041^2 + 303976^2 .

It is a cyclic number.

It is not a de Polignac number, because 242202144257 - 2⁴ = 242202144241 is a prime.

It is not a weakly prime, because it can be changed into another prime (242202144157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121101072128 + 121101072129.

It is an arithmetic number, because the mean of its divisors is an integer number (121101072129).

Almost surely, 2^242202144257 is an apocalyptic number.

It is an amenable number.

242202144257 is a deficient number, since it is larger than the sum of its proper divisors (1).

242202144257 is an equidigital number, since it uses as much as digits as its factorization.

242202144257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71680, while the sum is 35.

Adding to 242202144257 its reverse (752441202242), we get a palindrome (994643346499).

The spelling of 242202144257 in words is "two hundred forty-two billion, two hundred two million, one hundred forty-four thousand, two hundred fifty-seven".