251478352271 has 2 divisors, whose sum is σ = 251478352272. Its totient is φ = 251478352270.

The previous prime is 251478352261. The next prime is 251478352313. The reversal of 251478352271 is 172253874152.

251478352271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251478352271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251478352261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125739176135 + 125739176136.

It is an arithmetic number, because the mean of its divisors is an integer number (125739176136).

Almost surely, 2^251478352271 is an apocalyptic number.

251478352271 is a deficient number, since it is larger than the sum of its proper divisors (1).

251478352271 is an equidigital number, since it uses as much as digits as its factorization.

251478352271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 940800, while the sum is 47.

The spelling of 251478352271 in words is "two hundred fifty-one billion, four hundred seventy-eight million, three hundred fifty-two thousand, two hundred seventy-one".