520218393 has 8 divisors (see below), whose sum is σ = 723782208. Its totient is φ = 331733424.

The previous prime is 520218379. The next prime is 520218403. The reversal of 520218393 is 393812025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 520218393 - 2⁶ = 520218329 is a prime.

It is a super-3 number, since 3×520218393³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (520218313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3769630 + ... + 3769767.

It is an arithmetic number, because the mean of its divisors is an integer number (90472776).

Almost surely, 2^520218393 is an apocalyptic number.

It is an amenable number.

520218393 is a deficient number, since it is larger than the sum of its proper divisors (203563815).

520218393 is a wasteful number, since it uses less digits than its factorization.

520218393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7539423.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 520218393 is about 22808.2965826034. The cubic root of 520218393 is about 804.2577126742.

The spelling of 520218393 in words is "five hundred twenty million, two hundred eighteen thousand, three hundred ninety-three".