521620484 has 36 divisors (see below), whose sum is σ = 1158408720. Its totient is φ = 203227920.

The previous prime is 521620483. The next prime is 521620493. The reversal of 521620484 is 484026125.

It is a self number, because there is not a number n which added to its sum of digits gives 521620484.

It is not an unprimeable number, because it can be changed into a prime (521620483) 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 11 ways as a sum of consecutive naturals, for example, 118814 + ... + 123125.

It is an arithmetic number, because the mean of its divisors is an integer number (32178020).

Almost surely, 2^521620484 is an apocalyptic number.

It is an amenable number.

521620484 is an abundant number, since it is smaller than the sum of its proper divisors (636788236).

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

521620484 is a wasteful number, since it uses less digits than its factorization.

521620484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241968 (or 241959 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 521620484 is about 22839.0123254050. The cubic root of 521620484 is about 804.9796088093.

The spelling of 521620484 in words is "five hundred twenty-one million, six hundred twenty thousand, four hundred eighty-four".