12515515247 has 2 divisors, whose sum is σ = 12515515248. Its totient is φ = 12515515246.

The previous prime is 12515515231. The next prime is 12515515267. The reversal of 12515515247 is 74251551521.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12515515247 - 2⁴ = 12515515231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12515515247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12515515267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6257757623 + 6257757624.

It is an arithmetic number, because the mean of its divisors is an integer number (6257757624).

Almost surely, 2^12515515247 is an apocalyptic number.

12515515247 is a deficient number, since it is larger than the sum of its proper divisors (1).

12515515247 is an equidigital number, since it uses as much as digits as its factorization.

12515515247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70000, while the sum is 38.

The spelling of 12515515247 in words is "twelve billion, five hundred fifteen million, five hundred fifteen thousand, two hundred forty-seven".