516811423 has 2 divisors, whose sum is σ = 516811424. Its totient is φ = 516811422.

The previous prime is 516811409. The next prime is 516811439. The reversal of 516811423 is 324118615.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-516811423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (516011423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258405711 + 258405712.

It is an arithmetic number, because the mean of its divisors is an integer number (258405712).

Almost surely, 2^516811423 is an apocalyptic number.

516811423 is a deficient number, since it is larger than the sum of its proper divisors (1).

516811423 is an equidigital number, since it uses as much as digits as its factorization.

516811423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 31.

The square root of 516811423 is about 22733.4868201075. The cubic root of 516811423 is about 802.4981404770.

The spelling of 516811423 in words is "five hundred sixteen million, eight hundred eleven thousand, four hundred twenty-three".