42642228731 has 2 divisors, whose sum is σ = 42642228732. Its totient is φ = 42642228730.

The previous prime is 42642228721. The next prime is 42642228737. The reversal of 42642228731 is 13782224624.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42642228731 - 2¹⁰ = 42642227707 is a prime.

It is a super-2 number, since 2×42642228731² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42642228737) 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, 21321114365 + 21321114366.

It is an arithmetic number, because the mean of its divisors is an integer number (21321114366).

Almost surely, 2^42642228731 is an apocalyptic number.

42642228731 is a deficient number, since it is larger than the sum of its proper divisors (1).

42642228731 is an equidigital number, since it uses as much as digits as its factorization.

42642228731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 41.

The spelling of 42642228731 in words is "forty-two billion, six hundred forty-two million, two hundred twenty-eight thousand, seven hundred thirty-one".