516443243 has 2 divisors, whose sum is σ = 516443244. Its totient is φ = 516443242.

The previous prime is 516443231. The next prime is 516443251. The reversal of 516443243 is 342344615.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 516443243 - 2⁴ = 516443227 is a prime.

It is equal to p_27175226 and since 516443243 and 27175226 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (516443203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258221621 + 258221622.

It is an arithmetic number, because the mean of its divisors is an integer number (258221622).

Almost surely, 2^516443243 is an apocalyptic number.

516443243 is a deficient number, since it is larger than the sum of its proper divisors (1).

516443243 is an equidigital number, since it uses as much as digits as its factorization.

516443243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 32.

The square root of 516443243 is about 22725.3876314575. The cubic root of 516443243 is about 802.3075268131.

Adding to 516443243 its reverse (342344615), we get a palindrome (858787858).

The spelling of 516443243 in words is "five hundred sixteen million, four hundred forty-three thousand, two hundred forty-three".