131331313 has 4 divisors (see below), whose sum is σ = 131357668. Its totient is φ = 131304960.

The previous prime is 131331293. The next prime is 131331329. The reversal of 131331313 is 313133131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313133131 = 1753 ⋅178627.

It can be written as a sum of positive squares in 2 ways, for example, as 69755904 + 61575409 = 8352^2 + 7847^2 .

It is a cyclic number.

It is not a de Polignac number, because 131331313 - 2¹⁷ = 131200241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131331383) 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, 3168 + ... + 16513.

It is an arithmetic number, because the mean of its divisors is an integer number (32839417).

Almost surely, 2^131331313 is an apocalyptic number.

It is an amenable number.

131331313 is a deficient number, since it is larger than the sum of its proper divisors (26355).

131331313 is an equidigital number, since it uses as much as digits as its factorization.

131331313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26354.

The product of its digits is 243, while the sum is 19.

The square root of 131331313 is about 11459.9874781782. The cubic root of 131331313 is about 508.3031043447.

Adding to 131331313 its reverse (313133131), we get a palindrome (444464444).

It can be divided in two parts, 13133131 and 3, that multiplied together give a palindrome (39399393).

The spelling of 131331313 in words is "one hundred thirty-one million, three hundred thirty-one thousand, three hundred thirteen".