135244217 has 2 divisors, whose sum is σ = 135244218. Its totient is φ = 135244216.

The previous prime is 135244201. The next prime is 135244229. The reversal of 135244217 is 712442531.

135244217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85174441 + 50069776 = 9229^2 + 7076^2 .

It is a cyclic number.

It is not a de Polignac number, because 135244217 - 2⁴ = 135244201 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135244217.

It is not a weakly prime, because it can be changed into another prime (135244237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67622108 + 67622109.

It is an arithmetic number, because the mean of its divisors is an integer number (67622109).

Almost surely, 2^135244217 is an apocalyptic number.

It is an amenable number.

135244217 is a deficient number, since it is larger than the sum of its proper divisors (1).

135244217 is an equidigital number, since it uses as much as digits as its factorization.

135244217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 29.

The square root of 135244217 is about 11629.4547163657. The cubic root of 135244217 is about 513.3019348405.

Adding to 135244217 its reverse (712442531), we get a palindrome (847686748).

The spelling of 135244217 in words is "one hundred thirty-five million, two hundred forty-four thousand, two hundred seventeen".