135220135305 has 16 divisors (see below), whose sum is σ = 216402205824. Its totient is φ = 72100742400.

The previous prime is 135220135277. The next prime is 135220135339. The reversal of 135220135305 is 503531022531.

It is not a de Polignac number, because 135220135305 - 2¹⁰ = 135220134281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 974221 + ... + 1104330.

It is an arithmetic number, because the mean of its divisors is an integer number (13525137864).

Almost surely, 2^135220135305 is an apocalyptic number.

135220135305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

135220135305 is a deficient number, since it is larger than the sum of its proper divisors (81182070519).

135220135305 is a wasteful number, since it uses less digits than its factorization.

135220135305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2082896.

The product of its (nonzero) digits is 13500, while the sum is 30.

Adding to 135220135305 its reverse (503531022531), we get a palindrome (638751157836).

The spelling of 135220135305 in words is "one hundred thirty-five billion, two hundred twenty million, one hundred thirty-five thousand, three hundred five".