520105811 has 2 divisors, whose sum is σ = 520105812. Its totient is φ = 520105810.

The previous prime is 520105793. The next prime is 520105819. The reversal of 520105811 is 118501025.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 520105811 - 2¹⁰ = 520104787 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (520105819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260052905 + 260052906.

It is an arithmetic number, because the mean of its divisors is an integer number (260052906).

Almost surely, 2^520105811 is an apocalyptic number.

520105811 is a deficient number, since it is larger than the sum of its proper divisors (1).

520105811 is an equidigital number, since it uses as much as digits as its factorization.

520105811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 23.

The square root of 520105811 is about 22805.8284436238. The cubic root of 520105811 is about 804.1996912255.

Adding to 520105811 its reverse (118501025), we get a palindrome (638606836).

The spelling of 520105811 in words is "five hundred twenty million, one hundred five thousand, eight hundred eleven".