1331311323 has 64 divisors (see below), whose sum is σ = 2043417600. Its totient is φ = 768531456.

The previous prime is 1331311321. The next prime is 1331311343. The reversal of 1331311323 is 3231131331.

It is not a de Polignac number, because 1331311323 - 2¹ = 1331311321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1331311323.

It is not an unprimeable number, because it can be changed into a prime (1331311321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13724811 + ... + 13724907.

It is an arithmetic number, because the mean of its divisors is an integer number (31928400).

Almost surely, 2^1331311323 is an apocalyptic number.

1331311323 is a deficient number, since it is larger than the sum of its proper divisors (712106277).

1331311323 is an equidigital number, since it uses as much as digits as its factorization.

1331311323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 171 counting only the distinct ones).

The product of its digits is 486, while the sum is 21.

The square root of 1331311323 is about 36487.1391451837. The cubic root of 1331311323 is about 1100.0857572259.

Adding to 1331311323 its reverse (3231131331), we get a palindrome (4562442654).

The spelling of 1331311323 in words is "one billion, three hundred thirty-one million, three hundred eleven thousand, three hundred twenty-three".