520343511 has 8 divisors (see below), whose sum is σ = 699254784. Its totient is φ = 344163960.

The previous prime is 520343477. The next prime is 520343563. The reversal of 520343511 is 115343025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 520343511 - 2¹⁵ = 520310743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520343591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 682485 + ... + 683246.

It is an arithmetic number, because the mean of its divisors is an integer number (87406848).

Almost surely, 2^520343511 is an apocalyptic number.

520343511 is a deficient number, since it is larger than the sum of its proper divisors (178911273).

520343511 is a wasteful number, since it uses less digits than its factorization.

520343511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1365861.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 520343511 is about 22811.0392354228. The cubic root of 520343511 is about 804.3221849879.

Adding to 520343511 its reverse (115343025), we get a palindrome (635686536).

The spelling of 520343511 in words is "five hundred twenty million, three hundred forty-three thousand, five hundred eleven".