521447172 has 36 divisors (see below), whose sum is σ = 1284128496. Its totient is φ = 164666160.

The previous prime is 521447159. The next prime is 521447183. The reversal of 521447172 is 271744125.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55854 + ... + 64517.

It is an arithmetic number, because the mean of its divisors is an integer number (35670236).

Almost surely, 2^521447172 is an apocalyptic number.

It is an amenable number.

521447172 is an abundant number, since it is smaller than the sum of its proper divisors (762681324).

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

521447172 is a wasteful number, since it uses less digits than its factorization.

521447172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120416 (or 120395 counting only the distinct ones).

The product of its digits is 15680, while the sum is 33.

The square root of 521447172 is about 22835.2178005816. The cubic root of 521447172 is about 804.8904455929.

The spelling of 521447172 in words is "five hundred twenty-one million, four hundred forty-seven thousand, one hundred seventy-two".