135711181 has 4 divisors (see below), whose sum is σ = 135833152. Its totient is φ = 135589212.

The previous prime is 135711157. The next prime is 135711229. The reversal of 135711181 is 181117531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135711181 is a prime.

It is a super-2 number, since 2×135711181² = 36835049296829522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135711101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59301 + ... + 61546.

It is an arithmetic number, because the mean of its divisors is an integer number (33958288).

Almost surely, 2^135711181 is an apocalyptic number.

It is an amenable number.

135711181 is a deficient number, since it is larger than the sum of its proper divisors (121971).

135711181 is a wasteful number, since it uses less digits than its factorization.

135711181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121970.

The product of its digits is 840, while the sum is 28.

The square root of 135711181 is about 11649.5141958796. The cubic root of 135711181 is about 513.8920233755.

The spelling of 135711181 in words is "one hundred thirty-five million, seven hundred eleven thousand, one hundred eighty-one".