135505155 has 32 divisors (see below), whose sum is σ = 223179264. Its totient is φ = 70177536.

The previous prime is 135505129. The next prime is 135505157. The reversal of 135505155 is 551505531.

It is not a de Polignac number, because 135505155 - 2⁹ = 135504643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135505157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72442 + ... + 74288.

It is an arithmetic number, because the mean of its divisors is an integer number (6974352).

Almost surely, 2^135505155 is an apocalyptic number.

135505155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

135505155 is a deficient number, since it is larger than the sum of its proper divisors (87674109).

135505155 is a wasteful number, since it uses less digits than its factorization.

135505155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995.

The product of its (nonzero) digits is 9375, while the sum is 30.

The square root of 135505155 is about 11640.6681509267. The cubic root of 135505155 is about 513.6318415700.

The spelling of 135505155 in words is "one hundred thirty-five million, five hundred five thousand, one hundred fifty-five".