1331322013 has 12 divisors (see below), whose sum is σ = 1556032512. Its totient is φ = 1135716120.

The previous prime is 1331321977. The next prime is 1331322059. The reversal of 1331322013 is 3102231331.

It is not a de Polignac number, because 1331322013 - 2¹³ = 1331313821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331322313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54045 + ... + 74722.

It is an arithmetic number, because the mean of its divisors is an integer number (129669376).

Almost surely, 2^1331322013 is an apocalyptic number.

It is an amenable number.

1331322013 is a deficient number, since it is larger than the sum of its proper divisors (224710499).

1331322013 is a wasteful number, since it uses less digits than its factorization.

1331322013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128992 (or 128985 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1331322013 is about 36487.2856348619. The cubic root of 1331322013 is about 1100.0887016625.

Adding to 1331322013 its reverse (3102231331), we get a palindrome (4433553344).

The spelling of 1331322013 in words is "one billion, three hundred thirty-one million, three hundred twenty-two thousand, thirteen".