15542432225 has 12 divisors (see below), whose sum is σ = 19275385344. Its totient is φ = 12432159120.

The previous prime is 15542432219. The next prime is 15542432239. The reversal of 15542432225 is 52223424551.

It is a happy number.

It is not a de Polignac number, because 15542432225 - 2⁸ = 15542431969 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 (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 149312 + ... + 231038.

It is an arithmetic number, because the mean of its divisors is an integer number (1606282112).

Almost surely, 2^15542432225 is an apocalyptic number.

It is an amenable number.

15542432225 is a deficient number, since it is larger than the sum of its proper divisors (3732953119).

15542432225 is an equidigital number, since it uses as much as digits as its factorization.

15542432225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89344 (or 89339 counting only the distinct ones).

The product of its digits is 96000, while the sum is 35.

Adding to 15542432225 its reverse (52223424551), we get a palindrome (67765856776).

The spelling of 15542432225 in words is "fifteen billion, five hundred forty-two million, four hundred thirty-two thousand, two hundred twenty-five".