518234225 has 6 divisors (see below), whose sum is σ = 642610470. Its totient is φ = 414587360.

The previous prime is 518234221. The next prime is 518234231. The reversal of 518234225 is 522432815.

It can be written as a sum of positive squares in 3 ways, for example, as 262144 + 517972081 = 512^2 + 22759^2 .

It is not a de Polignac number, because 518234225 - 2² = 518234221 is a prime.

It is a super-2 number, since 2×518234225² = 537133423922701250, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 518234191 and 518234200.

It is not an unprimeable number, because it can be changed into a prime (518234221) 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, 10364660 + ... + 10364709.

It is an arithmetic number, because the mean of its divisors is an integer number (107101745).

Almost surely, 2^518234225 is an apocalyptic number.

It is an amenable number.

518234225 is a deficient number, since it is larger than the sum of its proper divisors (124376245).

518234225 is a wasteful number, since it uses less digits than its factorization.

518234225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20729379 (or 20729374 counting only the distinct ones).

The product of its digits is 19200, while the sum is 32.

The square root of 518234225 is about 22764.7583997722. The cubic root of 518234225 is about 803.2339019206.

The spelling of 518234225 in words is "five hundred eighteen million, two hundred thirty-four thousand, two hundred twenty-five".