254042305109 has 2 divisors, whose sum is σ = 254042305110. Its totient is φ = 254042305108.

The previous prime is 254042305091. The next prime is 254042305129. The reversal of 254042305109 is 901503240452.

Together with previous prime (254042305091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221014694884 + 33027610225 = 470122^2 + 181735^2 .

It is a cyclic number.

It is not a de Polignac number, because 254042305109 - 2⁸ = 254042304853 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254042305129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127021152554 + 127021152555.

It is an arithmetic number, because the mean of its divisors is an integer number (127021152555).

Almost surely, 2^254042305109 is an apocalyptic number.

It is an amenable number.

254042305109 is a deficient number, since it is larger than the sum of its proper divisors (1).

254042305109 is an equidigital number, since it uses as much as digits as its factorization.

254042305109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 254042305109 in words is "two hundred fifty-four billion, forty-two million, three hundred five thousand, one hundred nine".