15256865251 has 2 divisors, whose sum is σ = 15256865252. Its totient is φ = 15256865250.

The previous prime is 15256865243. The next prime is 15256865297.

15256865251 is nontrivially palindromic in base 10.

15256865251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (15256865297) can be obtained adding 15256865251 to its sum of digits (46).

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 15256865251 - 2³ = 15256865243 is a prime.

It is not a weakly prime, because it can be changed into another prime (15256865231) 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, 7628432625 + 7628432626.

It is an arithmetic number, because the mean of its divisors is an integer number (7628432626).

Almost surely, 2^15256865251 is an apocalyptic number.

15256865251 is a deficient number, since it is larger than the sum of its proper divisors (1).

15256865251 is an equidigital number, since it uses as much as digits as its factorization.

15256865251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720000, while the sum is 46.

The spelling of 15256865251 in words is "fifteen billion, two hundred fifty-six million, eight hundred sixty-five thousand, two hundred fifty-one".