15115025447 has 2 divisors, whose sum is σ = 15115025448. Its totient is φ = 15115025446.

The previous prime is 15115025413. The next prime is 15115025449. The reversal of 15115025447 is 74452051151.

It is a strong prime.

It is an emirp because it is prime and its reverse (74452051151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15115025447 - 2¹⁸ = 15114763303 is a prime.

Together with 15115025449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15115025449) 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, 7557512723 + 7557512724.

It is an arithmetic number, because the mean of its divisors is an integer number (7557512724).

Almost surely, 2^15115025447 is an apocalyptic number.

15115025447 is a deficient number, since it is larger than the sum of its proper divisors (1).

15115025447 is an equidigital number, since it uses as much as digits as its factorization.

15115025447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28000, while the sum is 35.

Adding to 15115025447 its reverse (74452051151), we get a palindrome (89567076598).

The spelling of 15115025447 in words is "fifteen billion, one hundred fifteen million, twenty-five thousand, four hundred forty-seven".