518225305 has 16 divisors (see below), whose sum is σ = 698826240. Its totient is φ = 366049728.

The previous prime is 518225299. The next prime is 518225311. The reversal of 518225305 is 503522815.

It is an interprime number because it is at equal distance from previous prime (518225299) and next prime (518225311).

It is a cyclic number.

It is not a de Polignac number, because 518225305 - 2⁷ = 518225177 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171825 + ... + 174814.

It is an arithmetic number, because the mean of its divisors is an integer number (43676640).

Almost surely, 2^518225305 is an apocalyptic number.

It is an amenable number.

518225305 is a deficient number, since it is larger than the sum of its proper divisors (180600935).

518225305 is a wasteful number, since it uses less digits than its factorization.

518225305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346680.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 518225305 is about 22764.5624820685. The cubic root of 518225305 is about 803.2292933947.

The spelling of 518225305 in words is "five hundred eighteen million, two hundred twenty-five thousand, three hundred five".