15725216225 has 12 divisors (see below), whose sum is σ = 19601364480. Its totient is φ = 12514304400.

The previous prime is 15725216179. The next prime is 15725216237. The reversal of 15725216225 is 52261252751.

15725216225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15725216225 - 2¹⁶ = 15725150689 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1641845 + ... + 1651394.

It is an arithmetic number, because the mean of its divisors is an integer number (1633447040).

Almost surely, 2^15725216225 is an apocalyptic number.

It is an amenable number.

15725216225 is a deficient number, since it is larger than the sum of its proper divisors (3876148255).

15725216225 is a wasteful number, since it uses less digits than its factorization.

15725216225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3293440 (or 3293435 counting only the distinct ones).

The product of its digits is 84000, while the sum is 38.

Adding to 15725216225 its reverse (52261252751), we get a palindrome (67986468976).

The spelling of 15725216225 in words is "fifteen billion, seven hundred twenty-five million, two hundred sixteen thousand, two hundred twenty-five".