513116551 has 2 divisors, whose sum is σ = 513116552. Its totient is φ = 513116550.

The previous prime is 513116497. The next prime is 513116581. The reversal of 513116551 is 155611315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 513116551 - 2²⁷ = 378898823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513116581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256558275 + 256558276.

It is an arithmetic number, because the mean of its divisors is an integer number (256558276).

Almost surely, 2^513116551 is an apocalyptic number.

513116551 is a deficient number, since it is larger than the sum of its proper divisors (1).

513116551 is an equidigital number, since it uses as much as digits as its factorization.

513116551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2250, while the sum is 28.

The square root of 513116551 is about 22652.0760858690. The cubic root of 513116551 is about 800.5811147590.

Adding to 513116551 its reverse (155611315), we get a palindrome (668727866).

The spelling of 513116551 in words is "five hundred thirteen million, one hundred sixteen thousand, five hundred fifty-one".