221232822 has 32 divisors (see below), whose sum is σ = 458542080. Its totient is φ = 71074080.

The previous prime is 221232821. The next prime is 221232839. The reversal of 221232822 is 228232122.

It is a junction number, because it is equal to n+sod(n) for n = 221232792 and 221232801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221232821) 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 15 ways as a sum of consecutive naturals, for example, 171793 + ... + 173075.

It is an arithmetic number, because the mean of its divisors is an integer number (14329440).

Almost surely, 2^221232822 is an apocalyptic number.

221232822 is an abundant number, since it is smaller than the sum of its proper divisors (237309258).

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

221232822 is a wasteful number, since it uses less digits than its factorization.

221232822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2308.

The product of its digits is 1536, while the sum is 24.

The square root of 221232822 is about 14873.8973372818. The cubic root of 221232822 is about 604.8065971065.

Adding to 221232822 its reverse (228232122), we get a palindrome (449464944).

The spelling of 221232822 in words is "two hundred twenty-one million, two hundred thirty-two thousand, eight hundred twenty-two".