15171515125139 has 2 divisors, whose sum is σ = 15171515125140. Its totient is φ = 15171515125138.

The previous prime is 15171515125073. The next prime is 15171515125237. The reversal of 15171515125139 is 93152151517151.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15171515125139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15171515125093 and 15171515125102.

It is not a weakly prime, because it can be changed into another prime (15171515175139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7585757562569 + 7585757562570.

It is an arithmetic number, because the mean of its divisors is an integer number (7585757562570).

Almost surely, 2^{15171515125139} is an apocalyptic number.

15171515125139 is a deficient number, since it is larger than the sum of its proper divisors (1).

15171515125139 is an equidigital number, since it uses as much as digits as its factorization.

15171515125139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 236250, while the sum is 47.

The spelling of 15171515125139 in words is "fifteen trillion, one hundred seventy-one billion, five hundred fifteen million, one hundred twenty-five thousand, one hundred thirty-nine".