15530222225 has 12 divisors (see below), whose sum is σ = 22008543744. Its totient is φ = 10649295120.

The previous prime is 15530222167. The next prime is 15530222243. The reversal of 15530222225 is 52222203551.

15530222225 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 15530222225 - 2⁶ = 15530222161 is a prime.

It is a Duffinian 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, 44371889 + ... + 44372238.

It is an arithmetic number, because the mean of its divisors is an integer number (1834045312).

Almost surely, 2^15530222225 is an apocalyptic number.

It is an amenable number.

15530222225 is a deficient number, since it is larger than the sum of its proper divisors (6478321519).

15530222225 is an equidigital number, since it uses as much as digits as its factorization.

15530222225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88744144 (or 88744139 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

Adding to 15530222225 its reverse (52222203551), we get a palindrome (67752425776).

The spelling of 15530222225 in words is "fifteen billion, five hundred thirty million, two hundred twenty-two thousand, two hundred twenty-five".