135220230137 has 2 divisors, whose sum is σ = 135220230138. Its totient is φ = 135220230136.

The previous prime is 135220230121. The next prime is 135220230191. The reversal of 135220230137 is 731032022531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94104151696 + 41116078441 = 306764^2 + 202771^2 .

It is a cyclic number.

It is not a de Polignac number, because 135220230137 - 2⁴ = 135220230121 is a prime.

It is not a weakly prime, because it can be changed into another prime (135220239137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67610115068 + 67610115069.

It is an arithmetic number, because the mean of its divisors is an integer number (67610115069).

Almost surely, 2^135220230137 is an apocalyptic number.

It is an amenable number.

135220230137 is a deficient number, since it is larger than the sum of its proper divisors (1).

135220230137 is an equidigital number, since it uses as much as digits as its factorization.

135220230137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 29.

Adding to 135220230137 its reverse (731032022531), we get a palindrome (866252252668).

The spelling of 135220230137 in words is "one hundred thirty-five billion, two hundred twenty million, two hundred thirty thousand, one hundred thirty-seven".