131131313 has 4 divisors (see below), whose sum is σ = 131619060. Its totient is φ = 130643568.

The previous prime is 131131307. The next prime is 131131321. The reversal of 131131313 is 313131131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53479969 + 77651344 = 7313^2 + 8812^2 .

It is a cyclic number.

It is not a de Polignac number, because 131131313 - 2¹⁶ = 131065777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131131291 and 131131300.

It is not an unprimeable number, because it can be changed into a prime (131131373) 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, 243470 + ... + 244007.

It is an arithmetic number, because the mean of its divisors is an integer number (32904765).

Almost surely, 2^131131313 is an apocalyptic number.

It is an amenable number.

131131313 is a deficient number, since it is larger than the sum of its proper divisors (487747).

131131313 is an equidigital number, since it uses as much as digits as its factorization.

131131313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487746.

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

The square root of 131131313 is about 11451.2581404840. The cubic root of 131131313 is about 508.0449474045.

Adding to 131131313 its reverse (313131131), we get a palindrome (444262444).

The spelling of 131131313 in words is "one hundred thirty-one million, one hundred thirty-one thousand, three hundred thirteen".