516941561 has 2 divisors, whose sum is σ = 516941562. Its totient is φ = 516941560.

The previous prime is 516941519. The next prime is 516941563. The reversal of 516941561 is 165149615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 478253161 + 38688400 = 21869^2 + 6220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-516941561 is a prime.

Together with 516941563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (516941563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258470780 + 258470781.

It is an arithmetic number, because the mean of its divisors is an integer number (258470781).

Almost surely, 2^516941561 is an apocalyptic number.

It is an amenable number.

516941561 is a deficient number, since it is larger than the sum of its proper divisors (1).

516941561 is an equidigital number, since it uses as much as digits as its factorization.

516941561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 38.

The square root of 516941561 is about 22736.3488933470. The cubic root of 516941561 is about 802.5654936956.

The spelling of 516941561 in words is "five hundred sixteen million, nine hundred forty-one thousand, five hundred sixty-one".