521501332 has 12 divisors (see below), whose sum is σ = 995593536. Its totient is φ = 237046040.

The previous prime is 521501327. The next prime is 521501339. The reversal of 521501332 is 233105125.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521501339) 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, 5926108 + ... + 5926195.

It is an arithmetic number, because the mean of its divisors is an integer number (82966128).

Almost surely, 2^521501332 is an apocalyptic number.

It is an amenable number.

521501332 is a deficient number, since it is larger than the sum of its proper divisors (474092204).

521501332 is a wasteful number, since it uses less digits than its factorization.

521501332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11852318 (or 11852316 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 521501332 is about 22836.4036573187. The cubic root of 521501332 is about 804.9183112200.

Adding to 521501332 its reverse (233105125), we get a palindrome (754606457).

The spelling of 521501332 in words is "five hundred twenty-one million, five hundred one thousand, three hundred thirty-two".