521340032 has 32 divisors (see below), whose sum is σ = 1042068720. Its totient is φ = 259801344.

The previous prime is 521340013. The next prime is 521340073. The reversal of 521340032 is 230043125.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×521340032² = 543590857931522048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 521339986 and 521340013.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32663 + ... + 45929.

Almost surely, 2^521340032 is an apocalyptic number.

It is an amenable number.

521340032 is a deficient number, since it is larger than the sum of its proper divisors (520728688).

521340032 is a wasteful number, since it uses less digits than its factorization.

521340032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13588 (or 13576 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 521340032 is about 22832.8717422930. The cubic root of 521340032 is about 804.8353157710.

Adding to 521340032 its reverse (230043125), we get a palindrome (751383157).

The spelling of 521340032 in words is "five hundred twenty-one million, three hundred forty thousand, thirty-two".