1131322313 has 4 divisors (see below), whose sum is σ = 1234169808. Its totient is φ = 1028474820.

The previous prime is 1131322267. The next prime is 1131322327. The reversal of 1131322313 is 3132231311.

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: 3132231311 = 11 ⋅284748301.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131322313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1131328313) 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 3 ways as a sum of consecutive naturals, for example, 51423731 + ... + 51423752.

It is an arithmetic number, because the mean of its divisors is an integer number (308542452).

Almost surely, 2^1131322313 is an apocalyptic number.

It is an amenable number.

1131322313 is a deficient number, since it is larger than the sum of its proper divisors (102847495).

1131322313 is a wasteful number, since it uses less digits than its factorization.

1131322313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102847494.

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

The square root of 1131322313 is about 33635.1350970975. The cubic root of 1131322313 is about 1041.9865607491.

Adding to 1131322313 its reverse (3132231311), we get a palindrome (4263553624).

It can be divided in two parts, 11 and 31322313, that multiplied together give a palindrome (344545443).

The spelling of 1131322313 in words is "one billion, one hundred thirty-one million, three hundred twenty-two thousand, three hundred thirteen".