518225538 has 16 divisors (see below), whose sum is σ = 1039066560. Its totient is φ = 172305936.

The previous prime is 518225531. The next prime is 518225557. The reversal of 518225538 is 835522815.

It is a junction number, because it is equal to n+sod(n) for n = 518225496 and 518225505.

It is not an unprimeable number, because it can be changed into a prime (518225531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106398 + ... + 111161.

It is an arithmetic number, because the mean of its divisors is an integer number (64941660).

Almost surely, 2^518225538 is an apocalyptic number.

518225538 is an abundant number, since it is smaller than the sum of its proper divisors (520841022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

518225538 is a wasteful number, since it uses less digits than its factorization.

518225538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217961.

The product of its digits is 96000, while the sum is 39.

The square root of 518225538 is about 22764.5675996712. The cubic root of 518225538 is about 803.2294137750.

The spelling of 518225538 in words is "five hundred eighteen million, two hundred twenty-five thousand, five hundred thirty-eight".