284529221 has 8 divisors (see below), whose sum is σ = 304250904. Its totient is φ = 265139200.

The previous prime is 284529209. The next prime is 284529257. The reversal of 284529221 is 122925482.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 248409121 + 36120100 = 15761^2 + 6010^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-284529221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284529521) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 81140 + ... + 84573.

It is an arithmetic number, because the mean of its divisors is an integer number (38031363).

Almost surely, 2^284529221 is an apocalyptic number.

It is an amenable number.

284529221 is a deficient number, since it is larger than the sum of its proper divisors (19721683).

284529221 is a wasteful number, since it uses less digits than its factorization.

284529221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165831.

The product of its digits is 23040, while the sum is 35.

The square root of 284529221 is about 16867.9939826880. The cubic root of 284529221 is about 657.7218832164.

It can be divided in two parts, 28452 and 9221, that added together give a palindrome (37673).

The spelling of 284529221 in words is "two hundred eighty-four million, five hundred twenty-nine thousand, two hundred twenty-one".