520515442 has 8 divisors (see below), whose sum is σ = 781970796. Its totient is φ = 259858512.

The previous prime is 520515421. The next prime is 520515449. The reversal of 520515442 is 244515025.

It can be written as a sum of positive squares in 2 ways, for example, as 506295001 + 14220441 = 22501^2 + 3771^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 520515442.

It is not an unprimeable number, because it can be changed into a prime (520515449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197973 + ... + 200584.

Almost surely, 2^520515442 is an apocalyptic number.

520515442 is a deficient number, since it is larger than the sum of its proper divisors (261455354).

520515442 is a wasteful number, since it uses less digits than its factorization.

520515442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399212.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 520515442 is about 22814.8075161725. The cubic root of 520515442 is about 804.4107628129.

The spelling of 520515442 in words is "five hundred twenty million, five hundred fifteen thousand, four hundred forty-two".