520242413 has 4 divisors (see below), whose sum is σ = 526827840. Its totient is φ = 513656988.

The previous prime is 520242409. The next prime is 520242421. The reversal of 520242413 is 314242025.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 520242413 - 2² = 520242409 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520242473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3292595 + ... + 3292752.

It is an arithmetic number, because the mean of its divisors is an integer number (131706960).

Almost surely, 2^520242413 is an apocalyptic number.

It is an amenable number.

520242413 is a deficient number, since it is larger than the sum of its proper divisors (6585427).

520242413 is an equidigital number, since it uses as much as digits as its factorization.

520242413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6585426.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 520242413 is about 22808.8231393029. The cubic root of 520242413 is about 804.2700907915.

Adding to 520242413 its reverse (314242025), we get a palindrome (834484438).

The spelling of 520242413 in words is "five hundred twenty million, two hundred forty-two thousand, four hundred thirteen".