1311310133 has 4 divisors (see below), whose sum is σ = 1498640160. Its totient is φ = 1123980108.

The previous prime is 1311310097. The next prime is 1311310151. The reversal of 1311310133 is 3310131131.

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: 3310131131 = 7907 ⋅418633.

It is a cyclic number.

It is not a de Polignac number, because 1311310133 - 2¹² = 1311306037 is a prime.

It is a super-3 number, since 3×1311310133³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311310163) 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, 93665003 + ... + 93665016.

It is an arithmetic number, because the mean of its divisors is an integer number (374660040).

Almost surely, 2^1311310133 is an apocalyptic number.

It is an amenable number.

1311310133 is a deficient number, since it is larger than the sum of its proper divisors (187330027).

1311310133 is an equidigital number, since it uses as much as digits as its factorization.

1311310133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187330026.

The product of its (nonzero) digits is 81, while the sum is 17.

The square root of 1311310133 is about 36212.0164172060. The cubic root of 1311310133 is about 1094.5488249204.

Adding to 1311310133 its reverse (3310131131), we get a palindrome (4621441264).

The spelling of 1311310133 in words is "one billion, three hundred eleven million, three hundred ten thousand, one hundred thirty-three".