521312352 has 144 divisors (see below), whose sum is σ = 1548735552. Its totient is φ = 152266240.

The previous prime is 521312321. The next prime is 521312353. The reversal of 521312352 is 253213125.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521312353) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 887803 + ... + 888389.

It is an arithmetic number, because the mean of its divisors is an integer number (10755108).

Almost surely, 2^521312352 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 521312352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (774367776).

521312352 is an abundant number, since it is smaller than the sum of its proper divisors (1027423200).

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

521312352 is a wasteful number, since it uses less digits than its factorization.

521312352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669 (or 632 counting only the distinct ones).

The product of its digits is 1800, while the sum is 24.

The square root of 521312352 is about 22832.2655906066. The cubic root of 521312352 is about 804.8210715577.

Adding to 521312352 its reverse (253213125), we get a palindrome (774525477).

The spelling of 521312352 in words is "five hundred twenty-one million, three hundred twelve thousand, three hundred fifty-two".