819225 has 36 divisors (see below), whose sum is σ = 1605552. Its totient is φ = 396000.

The previous prime is 819187. The next prime is 819229. The reversal of 819225 is 522918.

It is not a de Polignac number, because 819225 - 2⁸ = 818969 is a prime.

It is a super-2 number, since 2×819225² = 1342259201250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (819229) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2310 + ... + 2640.

2⁸¹⁹²²⁵ is an apocalyptic number.

It is an amenable number.

819225 is a deficient number, since it is larger than the sum of its proper divisors (786327).

819225 is a wasteful number, since it uses less digits than its factorization.

819225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 350 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 819225 is about 905.1104904927. The cubic root of 819225 is about 93.5695194418.

The spelling of 819225 in words is "eight hundred nineteen thousand, two hundred twenty-five".