131030813 has 2 divisors, whose sum is σ = 131030814. Its totient is φ = 131030812.

The previous prime is 131030803. The next prime is 131030819. The reversal of 131030813 is 318030131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107391769 + 23639044 = 10363^2 + 4862^2 .

It is a cyclic number.

It is not a de Polignac number, because 131030813 - 2²⁴ = 114253597 is a prime.

It is a super-3 number, since 3×131030813³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131030819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65515406 + 65515407.

It is an arithmetic number, because the mean of its divisors is an integer number (65515407).

Almost surely, 2^131030813 is an apocalyptic number.

It is an amenable number.

131030813 is a deficient number, since it is larger than the sum of its proper divisors (1).

131030813 is an equidigital number, since it uses as much as digits as its factorization.

131030813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 131030813 is about 11446.8691352701. The cubic root of 131030813 is about 507.9151244419.

Adding to 131030813 its reverse (318030131), we get a palindrome (449060944).

It can be divided in two parts, 1310 and 30813, that added together give a palindrome (32123).

The spelling of 131030813 in words is "one hundred thirty-one million, thirty thousand, eight hundred thirteen".