1323131320 has 48 divisors (see below), whose sum is σ = 3463098840. Its totient is φ = 453644352.

The previous prime is 1323131317. The next prime is 1323131353. The reversal of 1323131320 is 231313231.

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 11 ways as a sum of consecutive naturals, for example, 335574 + ... + 339493.

Almost surely, 2^1323131320 is an apocalyptic number.

1323131320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323131320 is an abundant number, since it is smaller than the sum of its proper divisors (2139967520).

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

1323131320 is a wasteful number, since it uses less digits than its factorization.

1323131320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675092 (or 675081 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1323131320 is about 36374.8720959951. The cubic root of 1323131320 is about 1097.8280338026.

Adding to 1323131320 its reverse (231313231), we get a palindrome (1554444551).

It can be divided in two parts, 13231 and 31320, that added together give a triangular number (44551 = T₂₉₈).

The spelling of 1323131320 in words is "one billion, three hundred twenty-three million, one hundred thirty-one thousand, three hundred twenty".