1323020331 has 16 divisors (see below), whose sum is σ = 2063190400. Its totient is φ = 835591464.

The previous prime is 1323020299. The next prime is 1323020353. The reversal of 1323020331 is 1330203231.

1323020331 is a `hidden beast` number, since 1 + 32 + 302 + 0 + 331 = 666.

It is not a de Polignac number, because 1323020331 - 2⁵ = 1323020299 is a prime.

It is a super-2 number, since 2×1323020331² = 3500765592478699122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1323020131) by changing a digit.

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, 1288981 + ... + 1290006.

It is an arithmetic number, because the mean of its divisors is an integer number (128949400).

Almost surely, 2^1323020331 is an apocalyptic number.

1323020331 is a deficient number, since it is larger than the sum of its proper divisors (740170069).

1323020331 is a wasteful number, since it uses less digits than its factorization.

1323020331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2579015 (or 2579009 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 1323020331 is about 36373.3464366423. The cubic root of 1323020331 is about 1097.7973363601.

Adding to 1323020331 its reverse (1330203231), we get a palindrome (2653223562).

The spelling of 1323020331 in words is "one billion, three hundred twenty-three million, twenty thousand, three hundred thirty-one".