308285225 has 24 divisors (see below), whose sum is σ = 418734360. Its totient is φ = 224107520.

The previous prime is 308285213. The next prime is 308285233. The reversal of 308285225 is 522582803.

It can be written as a sum of positive squares in 12 ways, for example, as 212521 + 308072704 = 461^2 + 17552^2 .

It is not a de Polignac number, because 308285225 - 2⁶ = 308285161 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 182 + ... + 24831.

It is an arithmetic number, because the mean of its divisors is an integer number (17447265).

Almost surely, 2^308285225 is an apocalyptic number.

It is an amenable number.

308285225 is a deficient number, since it is larger than the sum of its proper divisors (110449135).

308285225 is a wasteful number, since it uses less digits than its factorization.

308285225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25069 (or 25064 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

The square root of 308285225 is about 17558.0529957054. The cubic root of 308285225 is about 675.5397420516.

The spelling of 308285225 in words is "three hundred eight million, two hundred eighty-five thousand, two hundred twenty-five".