520422321 has 4 divisors (see below), whose sum is σ = 693896432. Its totient is φ = 346948212.

The previous prime is 520422319. The next prime is 520422341. The reversal of 520422321 is 123224025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 520422321 - 2¹ = 520422319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520422341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86737051 + ... + 86737056.

It is an arithmetic number, because the mean of its divisors is an integer number (173474108).

Almost surely, 2^520422321 is an apocalyptic number.

It is an amenable number.

520422321 is a deficient number, since it is larger than the sum of its proper divisors (173474111).

520422321 is a wasteful number, since it uses less digits than its factorization.

520422321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173474110.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 520422321 is about 22812.7666230994. The cubic root of 520422321 is about 804.3627898512.

Adding to 520422321 its reverse (123224025), we get a palindrome (643646346).

The spelling of 520422321 in words is "five hundred twenty million, four hundred twenty-two thousand, three hundred twenty-one".