204431310230137 has 2 divisors, whose sum is σ = 204431310230138. Its totient is φ = 204431310230136.

The previous prime is 204431310230117. The next prime is 204431310230179. The reversal of 204431310230137 is 731032013134402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199355733796921 + 5075576433216 = 14119339^2 + 2252904^2 .

It is a cyclic number.

It is not a de Polignac number, because 204431310230137 - 2³¹ = 204429162746489 is a prime.

It is not a weakly prime, because it can be changed into another prime (204431310230117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102215655115068 + 102215655115069.

It is an arithmetic number, because the mean of its divisors is an integer number (102215655115069).

Almost surely, 2^{204431310230137} is an apocalyptic number.

It is an amenable number.

204431310230137 is a deficient number, since it is larger than the sum of its proper divisors (1).

204431310230137 is an equidigital number, since it uses as much as digits as its factorization.

204431310230137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 34.

Adding to 204431310230137 its reverse (731032013134402), we get a palindrome (935463323364539).

The spelling of 204431310230137 in words is "two hundred four trillion, four hundred thirty-one billion, three hundred ten million, two hundred thirty thousand, one hundred thirty-seven".