284113221 has 24 divisors (see below), whose sum is σ = 441327744. Its totient is φ = 162106560.

The previous prime is 284113217. The next prime is 284113241. The reversal of 284113221 is 122311482.

It is not a de Polignac number, because 284113221 - 2² = 284113217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 284113191 and 284113200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284113241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150916 + ... + 152786.

It is an arithmetic number, because the mean of its divisors is an integer number (18388656).

Almost surely, 2^284113221 is an apocalyptic number.

284113221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

284113221 is a deficient number, since it is larger than the sum of its proper divisors (157214523).

284113221 is a wasteful number, since it uses less digits than its factorization.

284113221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2921 (or 2914 counting only the distinct ones).

The product of its digits is 768, while the sum is 24.

The square root of 284113221 is about 16855.6584267717. The cubic root of 284113221 is about 657.4011829884.

The spelling of 284113221 in words is "two hundred eighty-four million, one hundred thirteen thousand, two hundred twenty-one".