1313113133 has 4 divisors (see below), whose sum is σ = 1390355100. Its totient is φ = 1235871168.

The previous prime is 1313113117. The next prime is 1313113141. The reversal of 1313113133 is 3313113131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3313113131 = 23 ⋅144048397.

It can be written as a sum of positive squares in 2 ways, for example, as 915788644 + 397324489 = 30262^2 + 19933^2 .

It is not a de Polignac number, because 1313113133 - 2⁴ = 1313113117 is a prime.

It is a super-2 number, since 2×1313113133² = 3448532200114151378, which contains 22 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 (1313113433) 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, 38620958 + ... + 38620991.

It is an arithmetic number, because the mean of its divisors is an integer number (347588775).

Almost surely, 2^1313113133 is an apocalyptic number.

It is an amenable number.

1313113133 is a deficient number, since it is larger than the sum of its proper divisors (77241967).

1313113133 is an equidigital number, since it uses as much as digits as its factorization.

1313113133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77241966.

The product of its digits is 243, while the sum is 20.

The square root of 1313113133 is about 36236.9029167781. The cubic root of 1313113133 is about 1095.0502490789.

Adding to 1313113133 its reverse (3313113131), we get a palindrome (4626226264).

The spelling of 1313113133 in words is "one billion, three hundred thirteen million, one hundred thirteen thousand, one hundred thirty-three".