281132289 has 39 divisors (see below), whose sum is σ = 440830033. Its totient is φ = 179272764.

The previous prime is 281132279. The next prime is 281132297. The reversal of 281132289 is 982231182.

The square root of 281132289 is 16767.

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

It is not a de Polignac number, because 281132289 - 2⁷ = 281132161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (281132279) by changing a digit.

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 38 ways as a sum of consecutive naturals, for example, 12223132 + ... + 12223154.

Almost surely, 2^281132289 is an apocalyptic number.

281132289 is the 16767-th square number.

281132289 is the 8384-th centered octagonal number.

It is an amenable number.

281132289 is a deficient number, since it is larger than the sum of its proper divisors (159697744).

281132289 is an frugal number, since it uses more digits than its factorization.

281132289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82 (or 26 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The cubic root of 281132289 is about 655.0939313263.

Multiplying 281132289 by its sum of digits (36), we get a square (10120762404 = 100602²).

The spelling of 281132289 in words is "two hundred eighty-one million, one hundred thirty-two thousand, two hundred eighty-nine".