521971232328 has 960 divisors, whose sum is σ = 1902300744960. Its totient is φ = 130170240000.

The previous prime is 521971232309. The next prime is 521971232339. The reversal of 521971232328 is 823232179125.

521971232328 is a `hidden beast` number, since 5 + 2 + 1 + 97 + 1 + 232 + 328 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 3456763053 + ... + 3456763203.

It is an arithmetic number, because the mean of its divisors is an integer number (1981563276).

Almost surely, 2^521971232328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521971232328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (951150372480).

521971232328 is an abundant number, since it is smaller than the sum of its proper divisors (1380329512632).

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

521971232328 is a wasteful number, since it uses less digits than its factorization.

521971232328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 268 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The spelling of 521971232328 in words is "five hundred twenty-one billion, nine hundred seventy-one million, two hundred thirty-two thousand, three hundred twenty-eight".