1328220223 has 4 divisors (see below), whose sum is σ = 1448967528. Its totient is φ = 1207472920.

The previous prime is 1328220209. The next prime is 1328220233. The reversal of 1328220223 is 3220228231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1328220223 - 2¹³ = 1328212031 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 (1328220233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60373636 + ... + 60373657.

It is an arithmetic number, because the mean of its divisors is an integer number (362241882).

Almost surely, 2^1328220223 is an apocalyptic number.

1328220223 is a deficient number, since it is larger than the sum of its proper divisors (120747305).

1328220223 is a wasteful number, since it uses less digits than its factorization.

1328220223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120747304.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 1328220223 is about 36444.7557681486. The cubic root of 1328220223 is about 1099.2336874862.

Adding to 1328220223 its reverse (3220228231), we get a palindrome (4548448454).

The spelling of 1328220223 in words is "one billion, three hundred twenty-eight million, two hundred twenty thousand, two hundred twenty-three".