221303322 has 48 divisors (see below), whose sum is σ = 496215720. Its totient is φ = 71232000.

The previous prime is 221303273. The next prime is 221303353. The reversal of 221303322 is 223303122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 121682961 + 99620361 = 11031^2 + 9981^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221303295 and 221303304.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73054 + ... + 76022.

Almost surely, 2^221303322 is an apocalyptic number.

221303322 is an abundant number, since it is smaller than the sum of its proper divisors (274912398).

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

221303322 is a wasteful number, since it uses less digits than its factorization.

221303322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3119 (or 3116 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 221303322 is about 14876.2670720850. The cubic root of 221303322 is about 604.8708346163.

Adding to 221303322 its reverse (223303122), we get a palindrome (444606444).

It can be divided in two parts, 22130 and 3322, that added together give a palindrome (25452).

The spelling of 221303322 in words is "two hundred twenty-one million, three hundred three thousand, three hundred twenty-two".