520815442 has 16 divisors (see below), whose sum is σ = 893128320. Its totient is φ = 223131168.

The previous prime is 520815439. The next prime is 520815457. The reversal of 520815442 is 244518025.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62718 + ... + 70534.

It is an arithmetic number, because the mean of its divisors is an integer number (55820520).

Almost surely, 2^520815442 is an apocalyptic number.

520815442 is a deficient number, since it is larger than the sum of its proper divisors (372312878).

520815442 is a wasteful number, since it uses less digits than its factorization.

520815442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12585.

The product of its (nonzero) digits is 12800, while the sum is 31.

The square root of 520815442 is about 22821.3812465416. The cubic root of 520815442 is about 804.5652743232.

The spelling of 520815442 in words is "five hundred twenty million, eight hundred fifteen thousand, four hundred forty-two".