518023225 has 12 divisors (see below), whose sum is σ = 642725356. Its totient is φ = 414175680.

The previous prime is 518023223. The next prime is 518023241. The reversal of 518023225 is 522320815.

It can be written as a sum of positive squares in 6 ways, for example, as 8573184 + 509450041 = 2928^2 + 22571^2 .

It is not a de Polignac number, because 518023225 - 2¹ = 518023223 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 518023193 and 518023202.

It is not an unprimeable number, because it can be changed into a prime (518023223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46279 + ... + 56371.

Almost surely, 2^518023225 is an apocalyptic number.

It is an amenable number.

518023225 is a deficient number, since it is larger than the sum of its proper divisors (124702131).

518023225 is a wasteful number, since it uses less digits than its factorization.

518023225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12156 (or 12151 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 518023225 is about 22760.1235717208. The cubic root of 518023225 is about 803.1248744114.

The spelling of 518023225 in words is "five hundred eighteen million, twenty-three thousand, two hundred twenty-five".