1331314331 has 4 divisors (see below), whose sum is σ = 1331399664. Its totient is φ = 1331229000.

The previous prime is 1331314289. The next prime is 1331314423. The reversal of 1331314331 is 1334131331.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1331314331 - 2¹⁸ = 1331052187 is a prime.

It is a super-2 number, since 2×1331314331² = 3544795695851955122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331314297 and 1331314306.

It is not an unprimeable number, because it can be changed into a prime (1331314531) 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 in 3 ways as a sum of consecutive naturals, for example, 11840 + ... + 52941.

It is an arithmetic number, because the mean of its divisors is an integer number (332849916).

Almost surely, 2^1331314331 is an apocalyptic number.

1331314331 is a deficient number, since it is larger than the sum of its proper divisors (85333).

1331314331 is an equidigital number, since it uses as much as digits as its factorization.

1331314331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85332.

The product of its digits is 972, while the sum is 23.

The square root of 1331314331 is about 36487.1803651639. The cubic root of 1331314331 is about 1100.0865857463.

Adding to 1331314331 its reverse (1334131331), we get a palindrome (2665445662).

The spelling of 1331314331 in words is "one billion, three hundred thirty-one million, three hundred fourteen thousand, three hundred thirty-one".