221333046 has 64 divisors (see below), whose sum is σ = 502951680. Its totient is φ = 64319360.

The previous prime is 221333041. The next prime is 221333053. The reversal of 221333046 is 640333122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221333041) 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 31 ways as a sum of consecutive naturals, for example, 376765 + ... + 377351.

It is an arithmetic number, because the mean of its divisors is an integer number (7858620).

Almost surely, 2^221333046 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221333046, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251475840).

221333046 is an abundant number, since it is smaller than the sum of its proper divisors (281618634).

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

221333046 is a wasteful number, since it uses less digits than its factorization.

221333046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 221333046 is about 14877.2660794919. The cubic root of 221333046 is about 604.8979141552.

Adding to 221333046 its reverse (640333122), we get a palindrome (861666168).

The spelling of 221333046 in words is "two hundred twenty-one million, three hundred thirty-three thousand, forty-six".