272443285521 has 27 divisors (see below), whose sum is σ = 432584227803. Its totient is φ = 165106703520.

The previous prime is 272443285337. The next prime is 272443285531. The reversal of 272443285521 is 125582344272.

The square root of 272443285521 is 521961.

It is a perfect power (a square), and thus also a powerful number.

272443285521 is a `hidden beast` number, since 2 + 7 + 2 + 4 + 43 + 2 + 85 + 521 = 666.

272443285521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 242906051025 + 29537234496 = 492855^2 + 171864^2 .

It is not a de Polignac number, because 272443285521 - 2²³ = 272434896913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (272443285531) by changing a digit.

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 26 ways as a sum of consecutive naturals, for example, 17216805 + ... + 17232621.

Almost surely, 2^272443285521 is an apocalyptic number.

272443285521 is the 521961-st square number.

272443285521 is the 260981-st centered octagonal number.

It is an amenable number.

272443285521 is a deficient number, since it is larger than the sum of its proper divisors (160140942282).

272443285521 is an frugal number, since it uses more digits than its factorization.

272443285521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31662 (or 15831 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 45.

The spelling of 272443285521 in words is "two hundred seventy-two billion, four hundred forty-three million, two hundred eighty-five thousand, five hundred twenty-one".