131026513 has 2 divisors, whose sum is σ = 131026514. Its totient is φ = 131026512.

The previous prime is 131026507. The next prime is 131026517. The reversal of 131026513 is 315620131.

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., 89643024 + 41383489 = 9468^2 + 6433^2 .

It is a cyclic number.

It is not a de Polignac number, because 131026513 - 2¹⁷ = 130895441 is a prime.

It is not a weakly prime, because it can be changed into another prime (131026517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65513256 + 65513257.

It is an arithmetic number, because the mean of its divisors is an integer number (65513257).

Almost surely, 2^131026513 is an apocalyptic number.

It is an amenable number.

131026513 is a deficient number, since it is larger than the sum of its proper divisors (1).

131026513 is an equidigital number, since it uses as much as digits as its factorization.

131026513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 131026513 is about 11446.6813094451. The cubic root of 131026513 is about 507.9095683469.

Adding to 131026513 its reverse (315620131), we get a palindrome (446646644).

The spelling of 131026513 in words is "one hundred thirty-one million, twenty-six thousand, five hundred thirteen".