251556130927 has 2 divisors, whose sum is σ = 251556130928. Its totient is φ = 251556130926.

The previous prime is 251556130919. The next prime is 251556130933. The reversal of 251556130927 is 729031655152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251556130927 - 2³ = 251556130919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251556130957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125778065463 + 125778065464.

It is an arithmetic number, because the mean of its divisors is an integer number (125778065464).

Almost surely, 2^251556130927 is an apocalyptic number.

251556130927 is a deficient number, since it is larger than the sum of its proper divisors (1).

251556130927 is an equidigital number, since it uses as much as digits as its factorization.

251556130927 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567000, while the sum is 46.

The spelling of 251556130927 in words is "two hundred fifty-one billion, five hundred fifty-six million, one hundred thirty thousand, nine hundred twenty-seven".