1220320223 has 4 divisors (see below), whose sum is σ = 1273377648. Its totient is φ = 1167262800.

The previous prime is 1220320183. The next prime is 1220320229. The reversal of 1220320223 is 3220230221.

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 1220320223 - 2⁶ = 1220320159 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 (1220320229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26528678 + ... + 26528723.

It is an arithmetic number, because the mean of its divisors is an integer number (318344412).

Almost surely, 2^1220320223 is an apocalyptic number.

1220320223 is a deficient number, since it is larger than the sum of its proper divisors (53057425).

1220320223 is an equidigital number, since it uses as much as digits as its factorization.

1220320223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53057424.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 1220320223 is about 34933.0820712974. The cubic root of 1220320223 is about 1068.6232104393.

Adding to 1220320223 its reverse (3220230221), we get a palindrome (4440550444).

The spelling of 1220320223 in words is "one billion, two hundred twenty million, three hundred twenty thousand, two hundred twenty-three".