135143111 has 4 divisors (see below), whose sum is σ = 135344592. Its totient is φ = 134941632.

The previous prime is 135143059. The next prime is 135143117. The reversal of 135143111 is 111341531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135143111 - 2¹⁰ = 135142087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135143117) 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, 99731 + ... + 101076.

It is an arithmetic number, because the mean of its divisors is an integer number (33836148).

Almost surely, 2^135143111 is an apocalyptic number.

135143111 is a deficient number, since it is larger than the sum of its proper divisors (201481).

135143111 is an equidigital number, since it uses as much as digits as its factorization.

135143111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201480.

The product of its digits is 180, while the sum is 20.

The square root of 135143111 is about 11625.1069242394. The cubic root of 135143111 is about 513.1739913700.

Adding to 135143111 its reverse (111341531), we get a palindrome (246484642).

The spelling of 135143111 in words is "one hundred thirty-five million, one hundred forty-three thousand, one hundred eleven".