42310306681 has 2 divisors, whose sum is σ = 42310306682. Its totient is φ = 42310306680.

The previous prime is 42310306679. The next prime is 42310306747. The reversal of 42310306681 is 18660301324.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30879275625 + 11431031056 = 175725^2 + 106916^2 .

It is a cyclic number.

It is not a de Polignac number, because 42310306681 - 2¹ = 42310306679 is a prime.

It is a super-2 number, since 2×42310306681² (a number of 22 digits) contains 22 as substring.

Together with 42310306679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42310306651) 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, 21155153340 + 21155153341.

It is an arithmetic number, because the mean of its divisors is an integer number (21155153341).

Almost surely, 2^42310306681 is an apocalyptic number.

It is an amenable number.

42310306681 is a deficient number, since it is larger than the sum of its proper divisors (1).

42310306681 is an equidigital number, since it uses as much as digits as its factorization.

42310306681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 42310306681 in words is "forty-two billion, three hundred ten million, three hundred six thousand, six hundred eighty-one".