1311132313 has 4 divisors (see below), whose sum is σ = 1330701520. Its totient is φ = 1291563108.

The previous prime is 1311132301. The next prime is 1311132323. The reversal of 1311132313 is 3132311131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3132311131 = 28979 ⋅108089.

It is a cyclic number.

It is not a de Polignac number, because 1311132313 - 2¹³ = 1311124121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311132323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9784503 + ... + 9784636.

It is an arithmetic number, because the mean of its divisors is an integer number (332675380).

Almost surely, 2^1311132313 is an apocalyptic number.

It is an amenable number.

1311132313 is a deficient number, since it is larger than the sum of its proper divisors (19569207).

1311132313 is an equidigital number, since it uses as much as digits as its factorization.

1311132313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19569206.

The product of its digits is 162, while the sum is 19.

The square root of 1311132313 is about 36209.5610716286. The cubic root of 1311132313 is about 1094.4993473114.

Adding to 1311132313 its reverse (3132311131), we get a palindrome (4443443444).

The spelling of 1311132313 in words is "one billion, three hundred eleven million, one hundred thirty-two thousand, three hundred thirteen".