520411551 has 16 divisors (see below), whose sum is σ = 760814208. Its totient is φ = 313796000.

The previous prime is 520411543. The next prime is 520411561. The reversal of 520411551 is 155114025.

It is a cyclic number.

It is not a de Polignac number, because 520411551 - 2³ = 520411543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520411561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33525 + ... + 46526.

It is an arithmetic number, because the mean of its divisors is an integer number (47550888).

Almost surely, 2^520411551 is an apocalyptic number.

520411551 is a deficient number, since it is larger than the sum of its proper divisors (240402657).

520411551 is a wasteful number, since it uses less digits than its factorization.

520411551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80262.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 520411551 is about 22812.5305698425. The cubic root of 520411551 is about 804.3572411223.

Adding to 520411551 its reverse (155114025), we get a palindrome (675525576).

The spelling of 520411551 in words is "five hundred twenty million, four hundred eleven thousand, five hundred fifty-one".