518825 has 6 divisors (see below), whose sum is σ = 643374. Its totient is φ = 415040.

The previous prime is 518813. The next prime is 518831. The reversal of 518825 is 528815.

It can be written as a sum of positive squares in 3 ways, for example, as 11881 + 506944 = 109^2 + 712^2 .

It is not a de Polignac number, because 518825 - 2⁴ = 518809 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10352 + ... + 10401.

It is an arithmetic number, because the mean of its divisors is an integer number (107229).

2⁵¹⁸⁸²⁵ is an apocalyptic number.

It is an amenable number.

518825 is a deficient number, since it is larger than the sum of its proper divisors (124549).

518825 is a wasteful number, since it uses less digits than its factorization.

518825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20763 (or 20758 counting only the distinct ones).

The product of its digits is 3200, while the sum is 29.

The square root of 518825 is about 720.2950784227. The cubic root of 518825 is about 80.3539008686.

It can be divided in two parts, 518 and 825, that multiplied together give a triangular number (427350 = T₉₂₄).

The spelling of 518825 in words is "five hundred eighteen thousand, eight hundred twenty-five".