254220317191 has 2 divisors, whose sum is σ = 254220317192. Its totient is φ = 254220317190.

The previous prime is 254220317149. The next prime is 254220317317. The reversal of 254220317191 is 191713022452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 254220317191 - 2³¹ = 252072833543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 254220317191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254220317101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127110158595 + 127110158596.

It is an arithmetic number, because the mean of its divisors is an integer number (127110158596).

Almost surely, 2^254220317191 is an apocalyptic number.

254220317191 is a deficient number, since it is larger than the sum of its proper divisors (1).

254220317191 is an equidigital number, since it uses as much as digits as its factorization.

254220317191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 254220317191 in words is "two hundred fifty-four billion, two hundred twenty million, three hundred seventeen thousand, one hundred ninety-one".