15125043209 has 2 divisors, whose sum is σ = 15125043210. Its totient is φ = 15125043208.

The previous prime is 15125043149. The next prime is 15125043211. The reversal of 15125043209 is 90234052151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14848153609 + 276889600 = 121853^2 + 16640^2 .

It is an emirp because it is prime and its reverse (90234052151) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15125043209 is a prime.

Together with 15125043211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15125043239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7562521604 + 7562521605.

It is an arithmetic number, because the mean of its divisors is an integer number (7562521605).

Almost surely, 2^15125043209 is an apocalyptic number.

It is an amenable number.

15125043209 is a deficient number, since it is larger than the sum of its proper divisors (1).

15125043209 is an equidigital number, since it uses as much as digits as its factorization.

15125043209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 15125043209 in words is "fifteen billion, one hundred twenty-five million, forty-three thousand, two hundred nine".