135445213 has 2 divisors, whose sum is σ = 135445214. Its totient is φ = 135445212.

The previous prime is 135445199. The next prime is 135445237. The reversal of 135445213 is 312544531.

135445213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71876484 + 63568729 = 8478^2 + 7973^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135445213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135440213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67722606 + 67722607.

It is an arithmetic number, because the mean of its divisors is an integer number (67722607).

Almost surely, 2^135445213 is an apocalyptic number.

It is an amenable number.

135445213 is a deficient number, since it is larger than the sum of its proper divisors (1).

135445213 is an equidigital number, since it uses as much as digits as its factorization.

135445213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 28.

The square root of 135445213 is about 11638.0931857414. The cubic root of 135445213 is about 513.5560937487.

Adding to 135445213 its reverse (312544531), we get a palindrome (447989744).

The spelling of 135445213 in words is "one hundred thirty-five million, four hundred forty-five thousand, two hundred thirteen".