285132271 has 4 divisors (see below), whose sum is σ = 285196600. Its totient is φ = 285067944.

The previous prime is 285132181. The next prime is 285132277. The reversal of 285132271 is 172231582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 172231582 = 2 ⋅86115791.

It is a cyclic number.

It is not a de Polignac number, because 285132271 - 2¹³ = 285124079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285132277) 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 3 ways as a sum of consecutive naturals, for example, 24981 + ... + 34558.

It is an arithmetic number, because the mean of its divisors is an integer number (71299150).

Almost surely, 2^285132271 is an apocalyptic number.

285132271 is a deficient number, since it is larger than the sum of its proper divisors (64329).

285132271 is an equidigital number, since it uses as much as digits as its factorization.

285132271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64328.

The product of its digits is 6720, while the sum is 31.

The square root of 285132271 is about 16885.8600906202. The cubic root of 285132271 is about 658.1862283648.

The spelling of 285132271 in words is "two hundred eighty-five million, one hundred thirty-two thousand, two hundred seventy-one".