22185500225 has 48 divisors (see below), whose sum is σ = 33835441536. Its totient is φ = 14083200000.

The previous prime is 22185500213. The next prime is 22185500251. The reversal of 22185500225 is 52200558122.

It is not a de Polignac number, because 22185500225 - 2¹⁰ = 22185499201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22185500191 and 22185500200.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 120350 + ... + 242600.

It is an arithmetic number, because the mean of its divisors is an integer number (704905032).

Almost surely, 2^22185500225 is an apocalyptic number.

22185500225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22185500225 is a deficient number, since it is larger than the sum of its proper divisors (11649941311).

22185500225 is a wasteful number, since it uses less digits than its factorization.

22185500225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122346 (or 122341 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 32.

The spelling of 22185500225 in words is "twenty-two billion, one hundred eighty-five million, five hundred thousand, two hundred twenty-five".