521286272 has 32 divisors (see below), whose sum is σ = 1118388180. Its totient is φ = 240592896.

The previous prime is 521286257. The next prime is 521286301. The reversal of 521286272 is 272682125.

It can be written as a sum of positive squares in 2 ways, for example, as 448422976 + 72863296 = 21176^2 + 8536^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154973 + ... + 158300.

Almost surely, 2^521286272 is an apocalyptic number.

521286272 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

521286272 is an abundant number, since it is smaller than the sum of its proper divisors (597101908).

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

521286272 is a wasteful number, since it uses less digits than its factorization.

521286272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313300 (or 313288 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 521286272 is about 22831.6944618659. The cubic root of 521286272 is about 804.8076502480.

The spelling of 521286272 in words is "five hundred twenty-one million, two hundred eighty-six thousand, two hundred seventy-two".