30205225 has 6 divisors (see below), whose sum is σ = 37454510. Its totient is φ = 24164160.

The previous prime is 30205213. The next prime is 30205229. The reversal of 30205225 is 52250203.

It can be written as a sum of positive squares in 3 ways, for example, as 4439449 + 25765776 = 2107^2 + 5076^2 .

It is a de Polignac number, because none of the positive numbers 2^k-30205225 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30205229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 604080 + ... + 604129.

Almost surely, 2^30205225 is an apocalyptic number.

It is an amenable number.

30205225 is a deficient number, since it is larger than the sum of its proper divisors (7249285).

30205225 is a wasteful number, since it uses less digits than its factorization.

30205225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208219 (or 1208214 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 30205225 is about 5495.9280381024. The cubic root of 30205225 is about 311.4301763738.

Adding to 30205225 its reverse (52250203), we get a palindrome (82455428).

The spelling of 30205225 in words is "thirty million, two hundred five thousand, two hundred twenty-five".