15501332225 has 24 divisors (see below), whose sum is σ = 20378005248. Its totient is φ = 11676657600.

The previous prime is 15501332177. The next prime is 15501332239. The reversal of 15501332225 is 52223310551.

It is not a de Polignac number, because 15501332225 - 2¹⁰ = 15501331201 is a prime.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 241619 + ... + 298968.

It is an arithmetic number, because the mean of its divisors is an integer number (849083552).

Almost surely, 2^15501332225 is an apocalyptic number.

It is an amenable number.

15501332225 is a deficient number, since it is larger than the sum of its proper divisors (4876673023).

15501332225 is a wasteful number, since it uses less digits than its factorization.

15501332225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540665 (or 540660 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

Adding to 15501332225 its reverse (52223310551), we get a palindrome (67724642776).

The spelling of 15501332225 in words is "fifteen billion, five hundred one million, three hundred thirty-two thousand, two hundred twenty-five".