251301201271 has 2 divisors, whose sum is σ = 251301201272. Its totient is φ = 251301201270.

The previous prime is 251301201233. The next prime is 251301201299. The reversal of 251301201271 is 172102103152.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251301201271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251301201211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125650600635 + 125650600636.

It is an arithmetic number, because the mean of its divisors is an integer number (125650600636).

Almost surely, 2^251301201271 is an apocalyptic number.

251301201271 is a deficient number, since it is larger than the sum of its proper divisors (1).

251301201271 is an equidigital number, since it uses as much as digits as its factorization.

251301201271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 25.

The spelling of 251301201271 in words is "two hundred fifty-one billion, three hundred one million, two hundred one thousand, two hundred seventy-one".