30225209 has 6 divisors (see below), whose sum is σ = 35159994. Its totient is φ = 25907280.

The previous prime is 30225199. The next prime is 30225227. The reversal of 30225209 is 90252203.

It can be written as a sum of positive squares in only one way, i.e., 29735209 + 490000 = 5453^2 + 700^2 .

It is not a de Polignac number, because 30225209 - 2²⁰ = 29176633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30225229) 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, 308372 + ... + 308469.

It is an arithmetic number, because the mean of its divisors is an integer number (5859999).

Almost surely, 2^30225209 is an apocalyptic number.

It is an amenable number.

30225209 is a deficient number, since it is larger than the sum of its proper divisors (4934785).

30225209 is an equidigital number, since it uses as much as digits as its factorization.

30225209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616855 (or 616848 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 30225209 is about 5497.7458107846. The cubic root of 30225209 is about 311.4988427344.

The spelling of 30225209 in words is "thirty million, two hundred twenty-five thousand, two hundred nine".