520356243 has 16 divisors (see below), whose sum is σ = 757282176. Its totient is φ = 315200640.

The previous prime is 520356233. The next prime is 520356307. The reversal of 520356243 is 342653025.

It is not a de Polignac number, because 520356243 - 2⁴ = 520356227 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 520356243.

It is not an unprimeable number, because it can be changed into a prime (520356203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92880 + ... + 98322.

It is an arithmetic number, because the mean of its divisors is an integer number (47330136).

Almost surely, 2^520356243 is an apocalyptic number.

520356243 is a deficient number, since it is larger than the sum of its proper divisors (236925933).

520356243 is a wasteful number, since it uses less digits than its factorization.

520356243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8354.

The product of its (nonzero) digits is 21600, while the sum is 30.

The square root of 520356243 is about 22811.3183091201. The cubic root of 520356243 is about 804.3287451072.

The spelling of 520356243 in words is "five hundred twenty million, three hundred fifty-six thousand, two hundred forty-three".