304540225 has 12 divisors (see below), whose sum is σ = 411960240. Its totient is φ = 221483600.

The previous prime is 304540163. The next prime is 304540267. The reversal of 304540225 is 522045403.

It is not a de Polignac number, because 304540225 - 2⁹ = 304539713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 304540225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 553435 + ... + 553984.

It is an arithmetic number, because the mean of its divisors is an integer number (34330020).

Almost surely, 2^304540225 is an apocalyptic number.

It is an amenable number.

304540225 is a deficient number, since it is larger than the sum of its proper divisors (107420015).

304540225 is a wasteful number, since it uses less digits than its factorization.

304540225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107440 (or 1107435 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 304540225 is about 17451.0809120811. The cubic root of 304540225 is about 672.7931402154.

Adding to 304540225 its reverse (522045403), we get a palindrome (826585628).

The spelling of 304540225 in words is "three hundred four million, five hundred forty thousand, two hundred twenty-five".