521273984 has 64 divisors (see below), whose sum is σ = 1294747200. Its totient is φ = 203089920.

The previous prime is 521273983. The next prime is 521274011. The reversal of 521273984 is 489372125.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521273981) 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, 16589 + ... + 36300.

It is an arithmetic number, because the mean of its divisors is an integer number (20230425).

Almost surely, 2^521273984 is an apocalyptic number.

It is an amenable number.

521273984 is an abundant number, since it is smaller than the sum of its proper divisors (773473216).

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

521273984 is a wasteful number, since it uses less digits than its factorization.

521273984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52921 (or 52909 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 521273984 is about 22831.4253606734. The cubic root of 521273984 is about 804.8013264328.

The spelling of 521273984 in words is "five hundred twenty-one million, two hundred seventy-three thousand, nine hundred eighty-four".