135131475217 has 2 divisors, whose sum is σ = 135131475218. Its totient is φ = 135131475216.

The previous prime is 135131475211. The next prime is 135131475223. The reversal of 135131475217 is 712574131531.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (135131475211) and next prime (135131475223).

It can be written as a sum of positive squares in only one way, i.e., 79744676881 + 55386798336 = 282391^2 + 235344^2 .

It is an emirp because it is prime and its reverse (712574131531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135131475217 - 2³ = 135131475209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135131475217.

It is not a weakly prime, because it can be changed into another prime (135131475211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67565737608 + 67565737609.

It is an arithmetic number, because the mean of its divisors is an integer number (67565737609).

Almost surely, 2^135131475217 is an apocalyptic number.

It is an amenable number.

135131475217 is a deficient number, since it is larger than the sum of its proper divisors (1).

135131475217 is an equidigital number, since it uses as much as digits as its factorization.

135131475217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 88200, while the sum is 40.

The spelling of 135131475217 in words is "one hundred thirty-five billion, one hundred thirty-one million, four hundred seventy-five thousand, two hundred seventeen".