135515772281 has 2 divisors, whose sum is σ = 135515772282. Its totient is φ = 135515772280.

The previous prime is 135515772191. The next prime is 135515772313. The reversal of 135515772281 is 182277515531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114406297600 + 21109474681 = 338240^2 + 145291^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135515772281 is a prime.

It is a super-2 number, since 2×135515772281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (135515774281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67757886140 + 67757886141.

It is an arithmetic number, because the mean of its divisors is an integer number (67757886141).

Almost surely, 2^135515772281 is an apocalyptic number.

It is an amenable number.

135515772281 is a deficient number, since it is larger than the sum of its proper divisors (1).

135515772281 is an equidigital number, since it uses as much as digits as its factorization.

135515772281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 588000, while the sum is 47.

The spelling of 135515772281 in words is "one hundred thirty-five billion, five hundred fifteen million, seven hundred seventy-two thousand, two hundred eighty-one".