42043427442281 has 2 divisors, whose sum is σ = 42043427442282. Its totient is φ = 42043427442280.

The previous prime is 42043427442109. The next prime is 42043427442283. The reversal of 42043427442281 is 18224472434024.

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., 29212846721881 + 12830580720400 = 5404891^2 + 3581980^2 .

It is a cyclic number.

It is not a de Polignac number, because 42043427442281 - 2¹⁴ = 42043427425897 is a prime.

It is a super-2 number, since 2×42043427442281² (a number of 28 digits) contains 22 as substring.

Together with 42043427442283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42043427442283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21021713721140 + 21021713721141.

It is an arithmetic number, because the mean of its divisors is an integer number (21021713721141).

Almost surely, 2^{42043427442281} is an apocalyptic number.

It is an amenable number.

42043427442281 is a deficient number, since it is larger than the sum of its proper divisors (1).

42043427442281 is an equidigital number, since it uses as much as digits as its factorization.

42043427442281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2752512, while the sum is 47.

The spelling of 42043427442281 in words is "forty-two trillion, forty-three billion, four hundred twenty-seven million, four hundred forty-two thousand, two hundred eighty-one".