251479342087 has 2 divisors, whose sum is σ = 251479342088. Its totient is φ = 251479342086.

The previous prime is 251479342067. The next prime is 251479342123. The reversal of 251479342087 is 780243974152.

251479342087 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-251479342087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251479342057) 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, 125739671043 + 125739671044.

It is an arithmetic number, because the mean of its divisors is an integer number (125739671044).

Almost surely, 2^251479342087 is an apocalyptic number.

251479342087 is a deficient number, since it is larger than the sum of its proper divisors (1).

251479342087 is an equidigital number, since it uses as much as digits as its factorization.

251479342087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 251479342087 in words is "two hundred fifty-one billion, four hundred seventy-nine million, three hundred forty-two thousand, eighty-seven".