135521214553 has 2 divisors, whose sum is σ = 135521214554. Its totient is φ = 135521214552.

The previous prime is 135521214547. The next prime is 135521214589. The reversal of 135521214553 is 355412125531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126371718144 + 9149496409 = 355488^2 + 95653^2 .

It is a cyclic number.

It is not a de Polignac number, because 135521214553 - 2²¹ = 135519117401 is a prime.

It is not a weakly prime, because it can be changed into another prime (135521214523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67760607276 + 67760607277.

It is an arithmetic number, because the mean of its divisors is an integer number (67760607277).

Almost surely, 2^135521214553 is an apocalyptic number.

It is an amenable number.

135521214553 is a deficient number, since it is larger than the sum of its proper divisors (1).

135521214553 is an equidigital number, since it uses as much as digits as its factorization.

135521214553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90000, while the sum is 37.

The spelling of 135521214553 in words is "one hundred thirty-five billion, five hundred twenty-one million, two hundred fourteen thousand, five hundred fifty-three".