135220055 has 8 divisors (see below), whose sum is σ = 170804400. Its totient is φ = 102482496.

The previous prime is 135220051. The next prime is 135220061. The reversal of 135220055 is 550022531.

135220055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135220055 - 2² = 135220051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135220055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135220051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 711590 + ... + 711779.

It is an arithmetic number, because the mean of its divisors is an integer number (21350550).

Almost surely, 2^135220055 is an apocalyptic number.

135220055 is a deficient number, since it is larger than the sum of its proper divisors (35584345).

135220055 is a wasteful number, since it uses less digits than its factorization.

135220055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423393.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 135220055 is about 11628.4158422375. The cubic root of 135220055 is about 513.2713651045.

Adding to 135220055 its reverse (550022531), we get a palindrome (685242586).

The spelling of 135220055 in words is "one hundred thirty-five million, two hundred twenty thousand, fifty-five".