42806213137 has 2 divisors, whose sum is σ = 42806213138. Its totient is φ = 42806213136.

The previous prime is 42806213119. The next prime is 42806213159. The reversal of 42806213137 is 73131260824.

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., 37679080321 + 5127132816 = 194111^2 + 71604^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42806213137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42806213096 and 42806213105.

It is not a weakly prime, because it can be changed into another prime (42806213117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21403106568 + 21403106569.

It is an arithmetic number, because the mean of its divisors is an integer number (21403106569).

Almost surely, 2^42806213137 is an apocalyptic number.

It is an amenable number.

42806213137 is a deficient number, since it is larger than the sum of its proper divisors (1).

42806213137 is an equidigital number, since it uses as much as digits as its factorization.

42806213137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 42806213137 in words is "forty-two billion, eight hundred six million, two hundred thirteen thousand, one hundred thirty-seven".