520861711 has 4 divisors (see below), whose sum is σ = 520908624. Its totient is φ = 520814800.

The previous prime is 520861697. The next prime is 520861723. The reversal of 520861711 is 117168025.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 520861711 - 2¹³ = 520853519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520861771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3606 + ... + 32476.

It is an arithmetic number, because the mean of its divisors is an integer number (130227156).

Almost surely, 2^520861711 is an apocalyptic number.

520861711 is a deficient number, since it is larger than the sum of its proper divisors (46913).

520861711 is a wasteful number, since it uses less digits than its factorization.

520861711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46912.

The product of its (nonzero) digits is 3360, while the sum is 31.

The square root of 520861711 is about 22822.3949444400. The cubic root of 520861711 is about 804.5890993518.

The spelling of 520861711 in words is "five hundred twenty million, eight hundred sixty-one thousand, seven hundred eleven".