520303213 has 8 divisors (see below), whose sum is σ = 536667768. Its totient is φ = 504059904.

The previous prime is 520303177. The next prime is 520303219. The reversal of 520303213 is 312303025.

It can be written as a sum of positive squares in 4 ways, for example, as 17960644 + 502342569 = 4238^2 + 22413^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 520303213 - 2²¹ = 518206061 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 (520303219) 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, 21556 + ... + 38797.

It is an arithmetic number, because the mean of its divisors is an integer number (67083471).

Almost surely, 2^520303213 is an apocalyptic number.

It is an amenable number.

520303213 is a deficient number, since it is larger than the sum of its proper divisors (16364555).

520303213 is a wasteful number, since it uses less digits than its factorization.

520303213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60623.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 520303213 is about 22810.1559179239. The cubic root of 520303213 is about 804.3014208763.

Adding to 520303213 its reverse (312303025), we get a palindrome (832606238).

The spelling of 520303213 in words is "five hundred twenty million, three hundred three thousand, two hundred thirteen".