209225 has 6 divisors (see below), whose sum is σ = 259470. Its totient is φ = 167360.

The previous prime is 209221. The next prime is 209227. The reversal of 209225 is 522902.

It can be written as a sum of positive squares in 3 ways, for example, as 26896 + 182329 = 164^2 + 427^2 .

It is not a de Polignac number, because 209225 - 2² = 209221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 209197 and 209206.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 209225.

It is not an unprimeable number, because it can be changed into a prime (209221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4160 + ... + 4209.

It is an arithmetic number, because the mean of its divisors is an integer number (43245).

2²⁰⁹²²⁵ is an apocalyptic number.

209225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

209225 is a deficient number, since it is larger than the sum of its proper divisors (50245).

209225 is an equidigital number, since it uses as much as digits as its factorization.

209225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8379 (or 8374 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 209225 is about 457.4111935666. The cubic root of 209225 is about 59.3660097191.

It can be divided in two parts, 209 and 225, that added together give a palindrome (434).

The spelling of 209225 in words is "two hundred nine thousand, two hundred twenty-five".