251630128147 has 2 divisors, whose sum is σ = 251630128148. Its totient is φ = 251630128146.

The previous prime is 251630128129. The next prime is 251630128157. The reversal of 251630128147 is 741821036152.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251630128147 is a prime.

It is not a weakly prime, because it can be changed into another prime (251630128157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125815064073 + 125815064074.

It is an arithmetic number, because the mean of its divisors is an integer number (125815064074).

Almost surely, 2^251630128147 is an apocalyptic number.

251630128147 is a deficient number, since it is larger than the sum of its proper divisors (1).

251630128147 is an equidigital number, since it uses as much as digits as its factorization.

251630128147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 251630128147 in words is "two hundred fifty-one billion, six hundred thirty million, one hundred twenty-eight thousand, one hundred forty-seven".