305225 has 12 divisors (see below), whose sum is σ = 392460. Its totient is φ = 235200.

The previous prime is 305219. The next prime is 305231. The reversal of 305225 is 522503.

It is an interprime number because it is at equal distance from previous prime (305219) and next prime (305231).

It can be written as a sum of positive squares in 6 ways, for example, as 67081 + 238144 = 259^2 + 488^2 .

It is not a de Polignac number, because 305225 - 2⁴ = 305209 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 515 + ... + 935.

It is an arithmetic number, because the mean of its divisors is an integer number (32705).

2³⁰⁵²²⁵ is an apocalyptic number.

It is an amenable number.

305225 is a deficient number, since it is larger than the sum of its proper divisors (87235).

305225 is a wasteful number, since it uses less digits than its factorization.

305225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460 (or 455 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 305225 is about 552.4717187332. The cubic root of 305225 is about 67.3297033192.

Adding to 305225 its reverse (522503), we get a palindrome (827728).

The spelling of 305225 in words is "three hundred five thousand, two hundred twenty-five".