521403443052 has 12 divisors (see below), whose sum is σ = 1216608033816. Its totient is φ = 173801147680.

The previous prime is 521403443003. The next prime is 521403443111. The reversal of 521403443052 is 250344304125.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21725143449 + ... + 21725143472.

It is an arithmetic number, because the mean of its divisors is an integer number (101384002818).

Almost surely, 2^521403443052 is an apocalyptic number.

It is an amenable number.

521403443052 is an abundant number, since it is smaller than the sum of its proper divisors (695204590764).

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

521403443052 is a wasteful number, since it uses less digits than its factorization.

521403443052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43450286928 (or 43450286926 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 521403443052 its reverse (250344304125), we get a palindrome (771747747177).

The spelling of 521403443052 in words is "five hundred twenty-one billion, four hundred three million, four hundred forty-three thousand, fifty-two".