520561538 has 16 divisors (see below), whose sum is σ = 892957824. Its totient is φ = 222956160.

The previous prime is 520561529. The next prime is 520561583. The reversal of 520561538 is 835165025.

It is a junction number, because it is equal to n+sod(n) for n = 520561498 and 520561507.

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, 12803 + ... + 34713.

It is an arithmetic number, because the mean of its divisors is an integer number (55809864).

Almost surely, 2^520561538 is an apocalyptic number.

520561538 is a deficient number, since it is larger than the sum of its proper divisors (372396286).

520561538 is a wasteful number, since it uses less digits than its factorization.

520561538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23617.

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 520561538 is about 22815.8177149100. The cubic root of 520561538 is about 804.4345078811.

The spelling of 520561538 in words is "five hundred twenty million, five hundred sixty-one thousand, five hundred thirty-eight".