521576116 has 48 divisors (see below), whose sum is σ = 1003871232. Its totient is φ = 236044800.

The previous prime is 521576113. The next prime is 521576123. The reversal of 521576116 is 611675125.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521576113) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 380865 + ... + 382231.

It is an arithmetic number, because the mean of its divisors is an integer number (20913984).

Almost surely, 2^521576116 is an apocalyptic number.

It is an amenable number.

521576116 is a deficient number, since it is larger than the sum of its proper divisors (482295116).

521576116 is a wasteful number, since it uses less digits than its factorization.

521576116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600 (or 1598 counting only the distinct ones).

The product of its digits is 12600, while the sum is 34.

The square root of 521576116 is about 22838.0409842876. The cubic root of 521576116 is about 804.9567848411.

Subtracting 521576116 from its reverse (611675125), we obtain a palindrome (90099009).

The spelling of 521576116 in words is "five hundred twenty-one million, five hundred seventy-six thousand, one hundred sixteen".