520530243 has 8 divisors (see below), whose sum is σ = 694229328. Its totient is φ = 346925664.

The previous prime is 520530239. The next prime is 520530247. The reversal of 520530243 is 342035025.

It is an interprime number because it is at equal distance from previous prime (520530239) and next prime (520530247).

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

It is not a de Polignac number, because 520530243 - 2² = 520530239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (520530247) 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, 9580 + ... + 33657.

It is an arithmetic number, because the mean of its divisors is an integer number (86778666).

Almost surely, 2^520530243 is an apocalyptic number.

520530243 is a deficient number, since it is larger than the sum of its proper divisors (173699085).

520530243 is a wasteful number, since it uses less digits than its factorization.

520530243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47253.

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 520530243 is about 22815.1318865353. The cubic root of 520530243 is about 804.4183872878.

Adding to 520530243 its reverse (342035025), we get a palindrome (862565268).

The spelling of 520530243 in words is "five hundred twenty million, five hundred thirty thousand, two hundred forty-three".