1323231320 has 64 divisors (see below), whose sum is σ = 3021943680. Its totient is φ = 521404416.

The previous prime is 1323231319. The next prime is 1323231419. The reversal of 1323231320 is 231323231.

It is a super-2 number, since 2×1323231320² = 3501882252457884800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1323231292 and 1323231301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 996497 + ... + 997823.

It is an arithmetic number, because the mean of its divisors is an integer number (47217870).

Almost surely, 2^1323231320 is an apocalyptic number.

1323231320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323231320 is an abundant number, since it is smaller than the sum of its proper divisors (1698712360).

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

1323231320 is a wasteful number, since it uses less digits than its factorization.

1323231320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692 (or 1688 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 1323231320 is about 36376.2466453041. The cubic root of 1323231320 is about 1097.8556904270.

Adding to 1323231320 its reverse (231323231), we get a palindrome (1554554551).

The spelling of 1323231320 in words is "one billion, three hundred twenty-three million, two hundred thirty-one thousand, three hundred twenty".