521330352 has 20 divisors (see below), whose sum is σ = 1346770200. Its totient is φ = 173776768.

The previous prime is 521330321. The next prime is 521330353. The reversal of 521330352 is 253033125.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (521330353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5430477 + ... + 5430572.

It is an arithmetic number, because the mean of its divisors is an integer number (67338510).

Almost surely, 2^521330352 is an apocalyptic number.

It is an amenable number.

521330352 is an abundant number, since it is smaller than the sum of its proper divisors (825439848).

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

521330352 is a wasteful number, since it uses less digits than its factorization.

521330352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10861060 (or 10861054 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 521330352 is about 22832.6597662208. The cubic root of 521330352 is about 804.8303344705.

Adding to 521330352 its reverse (253033125), we get a palindrome (774363477).

The spelling of 521330352 in words is "five hundred twenty-one million, three hundred thirty thousand, three hundred fifty-two".