135220085 has 32 divisors (see below), whose sum is σ = 217873152. Its totient is φ = 77806080.

The previous prime is 135220061. The next prime is 135220097. The reversal of 135220085 is 580022531.

135220085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 135220085 - 2¹⁸ = 134957941 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8504 + ... + 18513.

It is an arithmetic number, because the mean of its divisors is an integer number (6808536).

Almost surely, 2^135220085 is an apocalyptic number.

It is an amenable number.

135220085 is a deficient number, since it is larger than the sum of its proper divisors (82653067).

135220085 is a wasteful number, since it uses less digits than its factorization.

135220085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27053.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 135220085 is about 11628.4171321810. The cubic root of 135220085 is about 513.2714030627.

The spelling of 135220085 in words is "one hundred thirty-five million, two hundred twenty thousand, eighty-five".