521650242 has 48 divisors (see below), whose sum is σ = 1145289600. Its totient is φ = 171585216.

The previous prime is 521650229. The next prime is 521650247. The reversal of 521650242 is 242056125.

521650242 is a `hidden beast` number, since 5 + 2 + 1 + 650 + 2 + 4 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (521650247) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 490203 + ... + 491265.

It is an arithmetic number, because the mean of its divisors is an integer number (23860200).

Almost surely, 2^521650242 is an apocalyptic number.

521650242 is an abundant number, since it is smaller than the sum of its proper divisors (623639358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521650242 is a wasteful number, since it uses less digits than its factorization.

521650242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407 (or 1404 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 521650242 is about 22839.6637891191. The cubic root of 521650242 is about 804.9949163163.

The spelling of 521650242 in words is "five hundred twenty-one million, six hundred fifty thousand, two hundred forty-two".