516811121 has 2 divisors, whose sum is σ = 516811122. Its totient is φ = 516811120.

The previous prime is 516811103. The next prime is 516811157. The reversal of 516811121 is 121118615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 494617600 + 22193521 = 22240^2 + 4711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-516811121 is a prime.

It is not a weakly prime, because it can be changed into another prime (516811171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258405560 + 258405561.

It is an arithmetic number, because the mean of its divisors is an integer number (258405561).

Almost surely, 2^516811121 is an apocalyptic number.

It is an amenable number.

516811121 is a deficient number, since it is larger than the sum of its proper divisors (1).

516811121 is an equidigital number, since it uses as much as digits as its factorization.

516811121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480, while the sum is 26.

The square root of 516811121 is about 22733.4801779226. The cubic root of 516811121 is about 802.4979841631.

Adding to 516811121 its reverse (121118615), we get a palindrome (637929736).

The spelling of 516811121 in words is "five hundred sixteen million, eight hundred eleven thousand, one hundred twenty-one".