516661241 has 2 divisors, whose sum is σ = 516661242. Its totient is φ = 516661240.

The previous prime is 516661219. The next prime is 516661253. The reversal of 516661241 is 142166615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 515290000 + 1371241 = 22700^2 + 1171^2 .

It is a cyclic number.

It is not a de Polignac number, because 516661241 - 2¹⁴ = 516644857 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 516661198 and 516661207.

It is not a weakly prime, because it can be changed into another prime (516661261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258330620 + 258330621.

It is an arithmetic number, because the mean of its divisors is an integer number (258330621).

Almost surely, 2^516661241 is an apocalyptic number.

It is an amenable number.

516661241 is a deficient number, since it is larger than the sum of its proper divisors (1).

516661241 is an equidigital number, since it uses as much as digits as its factorization.

516661241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 516661241 is about 22730.1834792419. The cubic root of 516661241 is about 802.4203993859.

The spelling of 516661241 in words is "five hundred sixteen million, six hundred sixty-one thousand, two hundred forty-one".