221284344 has 16 divisors (see below), whose sum is σ = 553210920. Its totient is φ = 73761440.

The previous prime is 221284333. The next prime is 221284363. The reversal of 221284344 is 443482122.

221284344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4610067 + ... + 4610114.

Almost surely, 2^221284344 is an apocalyptic number.

221284344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

221284344 is an abundant number, since it is smaller than the sum of its proper divisors (331926576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221284344 is a wasteful number, since it uses less digits than its factorization.

221284344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9220190 (or 9220186 counting only the distinct ones).

The product of its digits is 12288, while the sum is 30.

The square root of 221284344 is about 14875.6291967769. The cubic root of 221284344 is about 604.8535437674.

The spelling of 221284344 in words is "two hundred twenty-one million, two hundred eighty-four thousand, three hundred forty-four".