221322342 has 16 divisors (see below), whose sum is σ = 452063232. Its totient is φ = 72204360.

The previous prime is 221322323. The next prime is 221322347. The reversal of 221322342 is 243223122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221322347) 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, 392134 + ... + 392697.

It is an arithmetic number, because the mean of its divisors is an integer number (28253952).

Almost surely, 2^221322342 is an apocalyptic number.

221322342 is an abundant number, since it is smaller than the sum of its proper divisors (230740890).

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

221322342 is a wasteful number, since it uses less digits than its factorization.

221322342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784883.

The product of its digits is 1152, while the sum is 21.

The square root of 221322342 is about 14876.9063316269. The cubic root of 221322342 is about 604.8881627395. Note that the first 3 decimals are identical.

Adding to 221322342 its reverse (243223122), we get a palindrome (464545464).

The spelling of 221322342 in words is "two hundred twenty-one million, three hundred twenty-two thousand, three hundred forty-two".