5243145240997 has 2 divisors, whose sum is σ = 5243145240998. Its totient is φ = 5243145240996.

The previous prime is 5243145240961. The next prime is 5243145241001. The reversal of 5243145240997 is 7990425413425.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5236403845761 + 6741395236 = 2288319^2 + 82106^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5243145240997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5243145040997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2621572620498 + 2621572620499.

It is an arithmetic number, because the mean of its divisors is an integer number (2621572620499).

Almost surely, 2^{5243145240997} is an apocalyptic number.

It is an amenable number.

5243145240997 is a deficient number, since it is larger than the sum of its proper divisors (1).

5243145240997 is an equidigital number, since it uses as much as digits as its factorization.

5243145240997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10886400, while the sum is 55.

The spelling of 5243145240997 in words is "five trillion, two hundred forty-three billion, one hundred forty-five million, two hundred forty thousand, nine hundred ninety-seven".