15256665251 has 2 divisors, whose sum is σ = 15256665252. Its totient is φ = 15256665250.

The previous prime is 15256665241. The next prime is 15256665271.

15256665251 is nontrivially palindromic in base 10.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 15256665251 - 2³⁰ = 14182923427 is a prime.

It is not a weakly prime, because it can be changed into another prime (15256665241) 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, 7628332625 + 7628332626.

It is an arithmetic number, because the mean of its divisors is an integer number (7628332626).

Almost surely, 2^15256665251 is an apocalyptic number.

15256665251 is a deficient number, since it is larger than the sum of its proper divisors (1).

15256665251 is an equidigital number, since it uses as much as digits as its factorization.

15256665251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540000, while the sum is 44.

The spelling of 15256665251 in words is "fifteen billion, two hundred fifty-six million, six hundred sixty-five thousand, two hundred fifty-one".