516241813 has 2 divisors, whose sum is σ = 516241814. Its totient is φ = 516241812.

The previous prime is 516241807. The next prime is 516241829. The reversal of 516241813 is 318142615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 370870564 + 145371249 = 19258^2 + 12057^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-516241813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (516241513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258120906 + 258120907.

It is an arithmetic number, because the mean of its divisors is an integer number (258120907).

Almost surely, 2^516241813 is an apocalyptic number.

It is an amenable number.

516241813 is a deficient number, since it is larger than the sum of its proper divisors (1).

516241813 is an equidigital number, since it uses as much as digits as its factorization.

516241813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 31.

The square root of 516241813 is about 22720.9553716388. The cubic root of 516241813 is about 802.2032043970.

The spelling of 516241813 in words is "five hundred sixteen million, two hundred forty-one thousand, eight hundred thirteen".