135532213 has 2 divisors, whose sum is σ = 135532214. Its totient is φ = 135532212.

The previous prime is 135532181. The next prime is 135532237. The reversal of 135532213 is 312235531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73153809 + 62378404 = 8553^2 + 7898^2 .

It is a cyclic number.

It is not a de Polignac number, because 135532213 - 2⁵ = 135532181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135532613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67766106 + 67766107.

It is an arithmetic number, because the mean of its divisors is an integer number (67766107).

Almost surely, 2^135532213 is an apocalyptic number.

It is an amenable number.

135532213 is a deficient number, since it is larger than the sum of its proper divisors (1).

135532213 is an equidigital number, since it uses as much as digits as its factorization.

135532213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 25.

The square root of 135532213 is about 11641.8303114244. The cubic root of 135532213 is about 513.6660270478. Note that the first 3 decimals are identical.

Adding to 135532213 its reverse (312235531), we get a palindrome (447767744).

The spelling of 135532213 in words is "one hundred thirty-five million, five hundred thirty-two thousand, two hundred thirteen".