1331031323 has 2 divisors, whose sum is σ = 1331031324. Its totient is φ = 1331031322.

The previous prime is 1331031307. The next prime is 1331031343. The reversal of 1331031323 is 3231301331.

It is an a-pointer prime, because the next prime (1331031343) can be obtained adding 1331031323 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1331031323 - 2⁴ = 1331031307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1331031295 and 1331031304.

It is not a weakly prime, because it can be changed into another prime (1331031343) 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 as a sum of consecutive naturals, namely, 665515661 + 665515662.

It is an arithmetic number, because the mean of its divisors is an integer number (665515662).

Almost surely, 2^1331031323 is an apocalyptic number.

1331031323 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331031323 is an equidigital number, since it uses as much as digits as its factorization.

1331031323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 20.

The square root of 1331031323 is about 36483.3019750132. The cubic root of 1331031323 is about 1100.0086288579.

Adding to 1331031323 its reverse (3231301331), we get a palindrome (4562332654).

The spelling of 1331031323 in words is "one billion, three hundred thirty-one million, thirty-one thousand, three hundred twenty-three".