521381488 has 20 divisors (see below), whose sum is σ = 1045011240. Its totient is φ = 251701184.

The previous prime is 521381453. The next prime is 521381501. The reversal of 521381488 is 884183125.

It is a self number, because there is not a number n which added to its sum of digits gives 521381488.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561370 + ... + 562297.

It is an arithmetic number, because the mean of its divisors is an integer number (52250562).

Almost surely, 2^521381488 is an apocalyptic number.

521381488 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

521381488 is an abundant number, since it is smaller than the sum of its proper divisors (523629752).

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

521381488 is a wasteful number, since it uses less digits than its factorization.

521381488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123704 (or 1123698 counting only the distinct ones).

The product of its digits is 61440, while the sum is 40.

The square root of 521381488 is about 22833.7795382192. The cubic root of 521381488 is about 804.8566482133.

The spelling of 521381488 in words is "five hundred twenty-one million, three hundred eighty-one thousand, four hundred eighty-eight".