520146911 has 4 divisors (see below), whose sum is σ = 520387800. Its totient is φ = 519906024.

The previous prime is 520146881. The next prime is 520146917. The reversal of 520146911 is 119641025.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 520146911 - 2¹⁰ = 520145887 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 (520146917) 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, 117176 + ... + 121533.

It is an arithmetic number, because the mean of its divisors is an integer number (130096950).

Almost surely, 2^520146911 is an apocalyptic number.

520146911 is a deficient number, since it is larger than the sum of its proper divisors (240889).

520146911 is a wasteful number, since it uses less digits than its factorization.

520146911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240888.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 520146911 is about 22806.7295112649. The cubic root of 520146911 is about 804.2208739259.

Adding to 520146911 its reverse (119641025), we get a palindrome (639787936).

The spelling of 520146911 in words is "five hundred twenty million, one hundred forty-six thousand, nine hundred eleven".