518302223 has 2 divisors, whose sum is σ = 518302224. Its totient is φ = 518302222.

The previous prime is 518302219. The next prime is 518302231. The reversal of 518302223 is 322203815.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 518302223 - 2² = 518302219 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 518302192 and 518302201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (518392223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259151111 + 259151112.

It is an arithmetic number, because the mean of its divisors is an integer number (259151112).

Almost surely, 2^518302223 is an apocalyptic number.

518302223 is a deficient number, since it is larger than the sum of its proper divisors (1).

518302223 is an equidigital number, since it uses as much as digits as its factorization.

518302223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 518302223 is about 22766.2518434634. The cubic root of 518302223 is about 803.2690314094.

The spelling of 518302223 in words is "five hundred eighteen million, three hundred two thousand, two hundred twenty-three".