521069312 has 54 divisors (see below), whose sum is σ = 1105041588. Its totient is φ = 245174272.

The previous prime is 521069309. The next prime is 521069321. The reversal of 521069312 is 213960125.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 70463 + ... + 77505.

Almost surely, 2^521069312 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 521069312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (552520794).

521069312 is an abundant number, since it is smaller than the sum of its proper divisors (583972276).

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

521069312 is an equidigital number, since it uses as much as digits as its factorization.

521069312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7093 (or 7062 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 521069312 is about 22826.9426774590. The cubic root of 521069312 is about 804.6959807699.

The spelling of 521069312 in words is "five hundred twenty-one million, sixty-nine thousand, three hundred twelve".