521168312 has 48 divisors (see below), whose sum is σ = 1142300520. Its totient is φ = 222264000.

The previous prime is 521168287. The next prime is 521168321. The reversal of 521168312 is 213861125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79562 + ... + 85862.

Almost surely, 2^521168312 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 521168312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (571150260).

521168312 is an abundant number, since it is smaller than the sum of its proper divisors (621132208).

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

521168312 is a wasteful number, since it uses less digits than its factorization.

521168312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6532 (or 6521 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 521168312 is about 22829.1110646035. Note that the first 3 decimals coincide. The cubic root of 521168312 is about 804.7469399900.

The spelling of 521168312 in words is "five hundred twenty-one million, one hundred sixty-eight thousand, three hundred twelve".