516111361 has 2 divisors, whose sum is σ = 516111362. Its totient is φ = 516111360.

The previous prime is 516111331. The next prime is 516111377. The reversal of 516111361 is 163111615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 474586225 + 41525136 = 21785^2 + 6444^2 .

It is a cyclic number.

It is not a de Polignac number, because 516111361 - 2¹⁵ = 516078593 is a prime.

It is not a weakly prime, because it can be changed into another prime (516111331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258055680 + 258055681.

It is an arithmetic number, because the mean of its divisors is an integer number (258055681).

Almost surely, 2^516111361 is an apocalyptic number.

It is an amenable number.

516111361 is a deficient number, since it is larger than the sum of its proper divisors (1).

516111361 is an equidigital number, since it uses as much as digits as its factorization.

516111361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 25.

The square root of 516111361 is about 22718.0844482980. The cubic root of 516111361 is about 802.1356276492.

Adding to 516111361 its reverse (163111615), we get a palindrome (679222976).

The spelling of 516111361 in words is "five hundred sixteen million, one hundred eleven thousand, three hundred sixty-one".