518116253 has 2 divisors, whose sum is σ = 518116254. Its totient is φ = 518116252.

The previous prime is 518116243. The next prime is 518116279. The reversal of 518116253 is 352611815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 475370809 + 42745444 = 21803^2 + 6538^2 .

It is a cyclic number.

It is not a de Polignac number, because 518116253 - 2⁶ = 518116189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (518116223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259058126 + 259058127.

It is an arithmetic number, because the mean of its divisors is an integer number (259058127).

Almost surely, 2^518116253 is an apocalyptic number.

It is an amenable number.

518116253 is a deficient number, since it is larger than the sum of its proper divisors (1).

518116253 is an equidigital number, since it uses as much as digits as its factorization.

518116253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 32.

The square root of 518116253 is about 22762.1671419924. The cubic root of 518116253 is about 803.1729473068.

The spelling of 518116253 in words is "five hundred eighteen million, one hundred sixteen thousand, two hundred fifty-three".