42743207213281 has 2 divisors, whose sum is σ = 42743207213282. Its totient is φ = 42743207213280.

The previous prime is 42743207213263. The next prime is 42743207213293. The reversal of 42743207213281 is 18231270234724.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37406483495056 + 5336723718225 = 6116084^2 + 2310135^2 .

It is a cyclic number.

It is not a de Polignac number, because 42743207213281 - 2¹⁹ = 42743206688993 is a prime.

It is a super-2 number, since 2×42743207213281² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42743207213381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21371603606640 + 21371603606641.

It is an arithmetic number, because the mean of its divisors is an integer number (21371603606641).

Almost surely, 2^{42743207213281} is an apocalyptic number.

It is an amenable number.

42743207213281 is a deficient number, since it is larger than the sum of its proper divisors (1).

42743207213281 is an equidigital number, since it uses as much as digits as its factorization.

42743207213281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 903168, while the sum is 46.

The spelling of 42743207213281 in words is "forty-two trillion, seven hundred forty-three billion, two hundred seven million, two hundred thirteen thousand, two hundred eighty-one".