221330322 has 12 divisors (see below), whose sum is σ = 479549070. Its totient is φ = 73776768.

The previous prime is 221330309. The next prime is 221330339. The reversal of 221330322 is 223033122.

It is a happy number.

221330322 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 157025961 + 64304361 = 12531^2 + 8019^2 .

It is a super-2 number, since 2×221330322² = 97974222873247368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 12296129 = 221330322 / (2 + 2 + 1 + 3 + 3 + 0 + 3 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 221330295 and 221330304.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6148047 + ... + 6148082.

Almost surely, 2^221330322 is an apocalyptic number.

221330322 is an abundant number, since it is smaller than the sum of its proper divisors (258218748).

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

221330322 is a wasteful number, since it uses less digits than its factorization.

221330322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12296137 (or 12296134 counting only the distinct ones).

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

The square root of 221330322 is about 14877.1745301317. The cubic root of 221330322 is about 604.8954326028.

Adding to 221330322 its reverse (223033122), we get a palindrome (444363444).

The spelling of 221330322 in words is "two hundred twenty-one million, three hundred thirty thousand, three hundred twenty-two".