521520572 has 12 divisors (see below), whose sum is σ = 944132280. Its totient is φ = 251768496.

The previous prime is 521520551. The next prime is 521520581. The reversal of 521520572 is 275025125.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2247818 + ... + 2248049.

It is an arithmetic number, because the mean of its divisors is an integer number (78677690).

Almost surely, 2^521520572 is an apocalyptic number.

It is an amenable number.

521520572 is a deficient number, since it is larger than the sum of its proper divisors (422611708).

521520572 is a wasteful number, since it uses less digits than its factorization.

521520572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4495900 (or 4495898 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 521520572 is about 22836.8249106569. The cubic root of 521520572 is about 804.9282098447.

Adding to 521520572 its reverse (275025125), we get a palindrome (796545697).

The spelling of 521520572 in words is "five hundred twenty-one million, five hundred twenty thousand, five hundred seventy-two".