521303552 has 120 divisors (see below), whose sum is σ = 1322493480. Its totient is φ = 202997760.

The previous prime is 521303539. The next prime is 521303569. The reversal of 521303552 is 255303125.

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, 275024 + ... + 276912.

It is an arithmetic number, because the mean of its divisors is an integer number (11020779).

Almost surely, 2^521303552 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 521303552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (661246740).

521303552 is an abundant number, since it is smaller than the sum of its proper divisors (801189928).

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

521303552 is a wasteful number, since it uses less digits than its factorization.

521303552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932 (or 1909 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 521303552 is about 22832.0728800519. The cubic root of 521303552 is about 804.8165429450.

Adding to 521303552 its reverse (255303125), we get a palindrome (776606677).

The spelling of 521303552 in words is "five hundred twenty-one million, three hundred three thousand, five hundred fifty-two".