520042213 has 4 divisors (see below), whose sum is σ = 542652768. Its totient is φ = 497431660.

The previous prime is 520042207. The next prime is 520042231. The reversal of 520042213 is 312240025.

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 a de Polignac number, because none of the positive numbers 2^k-520042213 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 (520042513) 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, 11305243 + ... + 11305288.

It is an arithmetic number, because the mean of its divisors is an integer number (135663192).

Almost surely, 2^520042213 is an apocalyptic number.

It is an amenable number.

520042213 is a deficient number, since it is larger than the sum of its proper divisors (22610555).

520042213 is a wasteful number, since it uses less digits than its factorization.

520042213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22610554.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 520042213 is about 22804.4340644533. The cubic root of 520042213 is about 804.1669109875.

Adding to 520042213 its reverse (312240025), we get a palindrome (832282238).

The spelling of 520042213 in words is "five hundred twenty million, forty-two thousand, two hundred thirteen".