135111131 has 4 divisors (see below), whose sum is σ = 140985552. Its totient is φ = 129236712.

The previous prime is 135111127. The next prime is 135111133. The reversal of 135111131 is 131111531.

It is a happy number.

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 135111131 - 2² = 135111127 is a prime.

It is a super-2 number, since 2×135111131² = 36510035440198322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135111133) 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, 2937176 + ... + 2937221.

It is an arithmetic number, because the mean of its divisors is an integer number (35246388).

Almost surely, 2^135111131 is an apocalyptic number.

135111131 is a deficient number, since it is larger than the sum of its proper divisors (5874421).

135111131 is an equidigital number, since it uses as much as digits as its factorization.

135111131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5874420.

The product of its digits is 45, while the sum is 17.

The square root of 135111131 is about 11623.7313716379. The cubic root of 135111131 is about 513.1335093487.

Adding to 135111131 its reverse (131111531), we get a palindrome (266222662).

The spelling of 135111131 in words is "one hundred thirty-five million, one hundred eleven thousand, one hundred thirty-one".