42730811251 has 2 divisors, whose sum is σ = 42730811252. Its totient is φ = 42730811250.

The previous prime is 42730811237. The next prime is 42730811317. The reversal of 42730811251 is 15211803724.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42730811251 - 2¹⁵ = 42730778483 is a prime.

It is not a weakly prime, because it can be changed into another prime (42730811951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21365405625 + 21365405626.

It is an arithmetic number, because the mean of its divisors is an integer number (21365405626).

Almost surely, 2^42730811251 is an apocalyptic number.

42730811251 is a deficient number, since it is larger than the sum of its proper divisors (1).

42730811251 is an equidigital number, since it uses as much as digits as its factorization.

42730811251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 34.

The spelling of 42730811251 in words is "forty-two billion, seven hundred thirty million, eight hundred eleven thousand, two hundred fifty-one".