15251515139 has 6 divisors (see below), whose sum is σ = 17741558484. Its totient is φ = 13072727220.

The previous prime is 15251515121. The next prime is 15251515141. The reversal of 15251515139 is 93151515251.

15251515139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-15251515139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15251515109) 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 in 5 ways as a sum of consecutive naturals, for example, 155627657 + ... + 155627754.

It is an arithmetic number, because the mean of its divisors is an integer number (2956926414).

Almost surely, 2^15251515139 is an apocalyptic number.

15251515139 is a deficient number, since it is larger than the sum of its proper divisors (2490043345).

15251515139 is an equidigital number, since it uses as much as digits as its factorization.

15251515139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311255425 (or 311255418 counting only the distinct ones).

The product of its digits is 33750, while the sum is 38.

The spelling of 15251515139 in words is "fifteen billion, two hundred fifty-one million, five hundred fifteen thousand, one hundred thirty-nine".