135516553 has 4 divisors (see below), whose sum is σ = 135675540. Its totient is φ = 135357568.

The previous prime is 135516547. The next prime is 135516599. The reversal of 135516553 is 355615531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 355615531 = 53 ⋅6709727.

It can be written as a sum of positive squares in 2 ways, for example, as 89643024 + 45873529 = 9468^2 + 6773^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135516553 is a prime.

It is a super-3 number, since 3×135516553³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135516053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78208 + ... + 79921.

It is an arithmetic number, because the mean of its divisors is an integer number (33918885).

Almost surely, 2^135516553 is an apocalyptic number.

It is an amenable number.

135516553 is a deficient number, since it is larger than the sum of its proper divisors (158987).

135516553 is an equidigital number, since it uses as much as digits as its factorization.

135516553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158986.

The product of its digits is 33750, while the sum is 34.

The square root of 135516553 is about 11641.1577173407. The cubic root of 135516553 is about 513.6462425266.

The spelling of 135516553 in words is "one hundred thirty-five million, five hundred sixteen thousand, five hundred fifty-three".