42743247213281 has 2 divisors, whose sum is σ = 42743247213282. Its totient is φ = 42743247213280.

The previous prime is 42743247213239. The next prime is 42743247213301. The reversal of 42743247213281 is 18231274234724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37687517448256 + 5055729765025 = 6139016^2 + 2248495^2 .

It is a cyclic number.

It is not a de Polignac number, because 42743247213281 - 2¹⁸ = 42743246951137 is a prime.

It is a super-2 number, since 2×42743247213281² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42743207213281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21371623606640 + 21371623606641.

It is an arithmetic number, because the mean of its divisors is an integer number (21371623606641).

Almost surely, 2^{42743247213281} is an apocalyptic number.

It is an amenable number.

42743247213281 is a deficient number, since it is larger than the sum of its proper divisors (1).

42743247213281 is an equidigital number, since it uses as much as digits as its factorization.

42743247213281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3612672, while the sum is 50.

The spelling of 42743247213281 in words is "forty-two trillion, seven hundred forty-three billion, two hundred forty-seven million, two hundred thirteen thousand, two hundred eighty-one".