1323355221 has 6 divisors (see below), whose sum is σ = 1911513110. Its totient is φ = 882236808.

The previous prime is 1323355217. The next prime is 1323355223. The reversal of 1323355221 is 1225533231.

It is a happy number.

1323355221 is a `hidden beast` number, since 132 + 3 + 3 + 5 + 522 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1103900625 + 219454596 = 33225^2 + 14814^2 .

It is not a de Polignac number, because 1323355221 - 2² = 1323355217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323355223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73519726 + ... + 73519743.

Almost surely, 2^1323355221 is an apocalyptic number.

It is an amenable number.

1323355221 is a deficient number, since it is larger than the sum of its proper divisors (588157889).

1323355221 is a wasteful number, since it uses less digits than its factorization.

1323355221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147039475 (or 147039472 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 1323355221 is about 36377.9496536020. The cubic root of 1323355221 is about 1097.8899553285.

Adding to 1323355221 its reverse (1225533231), we get a palindrome (2548888452).

The spelling of 1323355221 in words is "one billion, three hundred twenty-three million, three hundred fifty-five thousand, two hundred twenty-one".