15805353225 has 12 divisors (see below), whose sum is σ = 26131517456. Its totient is φ = 8429521680.

The previous prime is 15805353209. The next prime is 15805353227. The reversal of 15805353225 is 52235350851.

It is not a de Polignac number, because 15805353225 - 2⁴ = 15805353209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15805353227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105368947 + ... + 105369096.

Almost surely, 2^15805353225 is an apocalyptic number.

15805353225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15805353225 is a deficient number, since it is larger than the sum of its proper divisors (10326164231).

15805353225 is a wasteful number, since it uses less digits than its factorization.

15805353225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210738056 (or 210738051 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 39.

The spelling of 15805353225 in words is "fifteen billion, eight hundred five million, three hundred fifty-three thousand, two hundred twenty-five".