135570217 has 2 divisors, whose sum is σ = 135570218. Its totient is φ = 135570216.

The previous prime is 135570209. The next prime is 135570251. The reversal of 135570217 is 712075531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123010281 + 12559936 = 11091^2 + 3544^2 .

It is a cyclic number.

It is not a de Polignac number, because 135570217 - 2³ = 135570209 is a prime.

It is not a weakly prime, because it can be changed into another prime (135570287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67785108 + 67785109.

It is an arithmetic number, because the mean of its divisors is an integer number (67785109).

Almost surely, 2^135570217 is an apocalyptic number.

It is an amenable number.

135570217 is a deficient number, since it is larger than the sum of its proper divisors (1).

135570217 is an equidigital number, since it uses as much as digits as its factorization.

135570217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 135570217 is about 11643.4624145913. The cubic root of 135570217 is about 513.7140341818.

The spelling of 135570217 in words is "one hundred thirty-five million, five hundred seventy thousand, two hundred seventeen".