520310421 has 24 divisors (see below), whose sum is σ = 798145920. Its totient is φ = 325696896.

The previous prime is 520310411. The next prime is 520310423. The reversal of 520310421 is 124013025.

It is not a de Polignac number, because 520310421 - 2⁵ = 520310389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 520310394 and 520310403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520310423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5860 + ... + 32786.

It is an arithmetic number, because the mean of its divisors is an integer number (33256080).

Almost surely, 2^520310421 is an apocalyptic number.

It is an amenable number.

520310421 is a deficient number, since it is larger than the sum of its proper divisors (277835499).

520310421 is a wasteful number, since it uses less digits than its factorization.

520310421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27065 (or 27062 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 520310421 is about 22810.3139171735. The cubic root of 520310421 is about 804.3051349784.

Adding to 520310421 its reverse (124013025), we get a palindrome (644323446).

The spelling of 520310421 in words is "five hundred twenty million, three hundred ten thousand, four hundred twenty-one".