133144111 has 4 divisors (see below), whose sum is σ = 133222072. Its totient is φ = 133066152.

The previous prime is 133144073. The next prime is 133144129. The reversal of 133144111 is 111441331.

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 133144111 - 2⁹ = 133143599 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 (133144811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36360 + ... + 39853.

It is an arithmetic number, because the mean of its divisors is an integer number (33305518).

Almost surely, 2^133144111 is an apocalyptic number.

133144111 is a deficient number, since it is larger than the sum of its proper divisors (77961).

133144111 is an equidigital number, since it uses as much as digits as its factorization.

133144111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77960.

The product of its digits is 144, while the sum is 19.

The square root of 133144111 is about 11538.8089073353. The cubic root of 133144111 is about 510.6311690833.

Adding to 133144111 its reverse (111441331), we get a palindrome (244585442).

The spelling of 133144111 in words is "one hundred thirty-three million, one hundred forty-four thousand, one hundred eleven".