518223225 has 48 divisors (see below), whose sum is σ = 936592832. Its totient is φ = 251285760.

The previous prime is 518223217. The next prime is 518223227. The reversal of 518223225 is 522322815.

It is not a de Polignac number, because 518223225 - 2³ = 518223217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 518223192 and 518223201.

It is not an unprimeable number, because it can be changed into a prime (518223227) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 61359 + ... + 69291.

Almost surely, 2^518223225 is an apocalyptic number.

It is an amenable number.

518223225 is a deficient number, since it is larger than the sum of its proper divisors (418369607).

518223225 is a wasteful number, since it uses less digits than its factorization.

518223225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8026 (or 8021 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 518223225 is about 22764.5167969803. The cubic root of 518223225 is about 803.2282187533.

The spelling of 518223225 in words is "five hundred eighteen million, two hundred twenty-three thousand, two hundred twenty-five".