9819225 has 60 divisors (see below), whose sum is σ = 19640236. Its totient is φ = 4821120.

The previous prime is 9819223. The next prime is 9819239. The reversal of 9819225 is 5229189.

9819225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 944784 + 8874441 = 972^2 + 2979^2 .

It is not a de Polignac number, because 9819225 - 2¹ = 9819223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9819225.

It is not an unprimeable number, because it can be changed into a prime (9819221) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 26139 + ... + 26511.

Almost surely, 2^9819225 is an apocalyptic number.

It is an amenable number.

9819225 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

9819225 is a wasteful number, since it uses less digits than its factorization.

9819225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 394 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 9819225 is about 3133.5642645397. The cubic root of 9819225 is about 214.1373401447.

Subtracting from 9819225 its sum of digits (36), we obtain a palindrome (9819189).

The spelling of 9819225 in words is "nine million, eight hundred nineteen thousand, two hundred twenty-five".