221334822 has 16 divisors (see below), whose sum is σ = 491855280. Its totient is φ = 73778256.

The previous prime is 221334821. The next prime is 221334829. The reversal of 221334822 is 228433122.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221334821) 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, 2049343 + ... + 2049450.

It is an arithmetic number, because the mean of its divisors is an integer number (30740955).

Almost surely, 2^221334822 is an apocalyptic number.

221334822 is an abundant number, since it is smaller than the sum of its proper divisors (270520458).

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

221334822 is a wasteful number, since it uses less digits than its factorization.

221334822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4098804 (or 4098798 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 221334822 is about 14877.3257677581. The cubic root of 221334822 is about 604.8995320727.

Adding to 221334822 its reverse (228433122), we get a palindrome (449767944).

The spelling of 221334822 in words is "two hundred twenty-one million, three hundred thirty-four thousand, eight hundred twenty-two".