520531121 has 16 divisors (see below), whose sum is σ = 601776000. Its totient is φ = 445737600.

The previous prime is 520531111. The next prime is 520531127. The reversal of 520531121 is 121135025.

It is a happy number.

It is not a de Polignac number, because 520531121 - 2¹⁴ = 520514737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520531093 and 520531102.

It is not an unprimeable number, because it can be changed into a prime (520531127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6821 + ... + 32978.

It is an arithmetic number, because the mean of its divisors is an integer number (37611000).

Almost surely, 2^520531121 is an apocalyptic number.

It is an amenable number.

520531121 is a deficient number, since it is larger than the sum of its proper divisors (81244879).

520531121 is a wasteful number, since it uses less digits than its factorization.

520531121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39880.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 520531121 is about 22815.1511281429. The cubic root of 520531121 is about 804.4188395696.

Adding to 520531121 its reverse (121135025), we get a palindrome (641666146).

The spelling of 520531121 in words is "five hundred twenty million, five hundred thirty-one thousand, one hundred twenty-one".