1331312213 has 24 divisors (see below), whose sum is σ = 1694131200. Its totient is φ = 1034517120.

The previous prime is 1331312201. The next prime is 1331312221. The reversal of 1331312213 is 3122131331.

It is not a de Polignac number, because 1331312213 - 2⁶ = 1331312149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331312113) 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 23 ways as a sum of consecutive naturals, for example, 203213 + ... + 209661.

It is an arithmetic number, because the mean of its divisors is an integer number (70588800).

Almost surely, 2^1331312213 is an apocalyptic number.

It is an amenable number.

1331312213 is a deficient number, since it is larger than the sum of its proper divisors (362818987).

1331312213 is a wasteful number, since it uses less digits than its factorization.

1331312213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6857 (or 6850 counting only the distinct ones).

The product of its digits is 324, while the sum is 20.

The square root of 1331312213 is about 36487.1513412598. The cubic root of 1331312213 is about 1100.0860023667.

Adding to 1331312213 its reverse (3122131331), we get a palindrome (4453443544).

The spelling of 1331312213 in words is "one billion, three hundred thirty-one million, three hundred twelve thousand, two hundred thirteen".