521431484 has 24 divisors (see below), whose sum is σ = 1078825440. Its totient is φ = 215764416.

The previous prime is 521431457. The next prime is 521431487. The reversal of 521431484 is 484134125.

It is a self number, because there is not a number n which added to its sum of digits gives 521431484.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521431487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320267 + ... + 321890.

It is an arithmetic number, because the mean of its divisors is an integer number (44951060).

Almost surely, 2^521431484 is an apocalyptic number.

It is an amenable number.

521431484 is an abundant number, since it is smaller than the sum of its proper divisors (557393956).

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

521431484 is a wasteful number, since it uses less digits than its factorization.

521431484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642197 (or 642195 counting only the distinct ones).

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

The square root of 521431484 is about 22834.8742935012. The cubic root of 521431484 is about 804.8823736676.

The spelling of 521431484 in words is "five hundred twenty-one million, four hundred thirty-one thousand, four hundred eighty-four".