42430255203517 has 2 divisors, whose sum is σ = 42430255203518. Its totient is φ = 42430255203516.

The previous prime is 42430255203403. The next prime is 42430255203547. The reversal of 42430255203517 is 71530255203424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31831024326201 + 10599230877316 = 5641899^2 + 3255646^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42430255203517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42430255203547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21215127601758 + 21215127601759.

It is an arithmetic number, because the mean of its divisors is an integer number (21215127601759).

Almost surely, 2^{42430255203517} is an apocalyptic number.

It is an amenable number.

42430255203517 is a deficient number, since it is larger than the sum of its proper divisors (1).

42430255203517 is an equidigital number, since it uses as much as digits as its factorization.

42430255203517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008000, while the sum is 43.

The spelling of 42430255203517 in words is "forty-two trillion, four hundred thirty billion, two hundred fifty-five million, two hundred three thousand, five hundred seventeen".