1323131223 has 4 divisors (see below), whose sum is σ = 1764174968. Its totient is φ = 882087480.

The previous prime is 1323131207. The next prime is 1323131237. The reversal of 1323131223 is 3221313231.

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

It is not a de Polignac number, because 1323131223 - 2⁴ = 1323131207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1323131223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323131123) 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, 220521868 + ... + 220521873.

It is an arithmetic number, because the mean of its divisors is an integer number (441043742).

Almost surely, 2^1323131223 is an apocalyptic number.

1323131223 is a deficient number, since it is larger than the sum of its proper divisors (441043745).

1323131223 is an equidigital number, since it uses as much as digits as its factorization.

1323131223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441043744.

The product of its digits is 648, while the sum is 21.

The square root of 1323131223 is about 36374.8707626570. The cubic root of 1323131223 is about 1097.8280069750.

Adding to 1323131223 its reverse (3221313231), we get a palindrome (4544444454).

The spelling of 1323131223 in words is "one billion, three hundred twenty-three million, one hundred thirty-one thousand, two hundred twenty-three".