133111233 has 12 divisors (see below), whose sum is σ = 194176788. Its totient is φ = 87861600.

The previous prime is 133111219. The next prime is 133111261. The reversal of 133111233 is 332111331.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 120494529 + 12616704 = 10977^2 + 3552^2 .

It is not a de Polignac number, because 133111233 - 2¹⁰ = 133110209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133111213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72310 + ... + 74127.

It is an arithmetic number, because the mean of its divisors is an integer number (16181399).

Almost surely, 2^133111233 is an apocalyptic number.

It is an amenable number.

133111233 is a deficient number, since it is larger than the sum of its proper divisors (61065555).

133111233 is a wasteful number, since it uses less digits than its factorization.

133111233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146544 (or 146541 counting only the distinct ones).

The product of its digits is 162, while the sum is 18.

The square root of 133111233 is about 11537.3841489308. The cubic root of 133111233 is about 510.5891346453.

Adding to 133111233 its reverse (332111331), we get a palindrome (465222564).

The spelling of 133111233 in words is "one hundred thirty-three million, one hundred eleven thousand, two hundred thirty-three".