133011233 has 4 divisors (see below), whose sum is σ = 133127748. Its totient is φ = 132894720.

The previous prime is 133011227. The next prime is 133011239. The reversal of 133011233 is 332110331.

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

It is an interprime number because it is at equal distance from previous prime (133011227) and next prime (133011239).

It can be written as a sum of positive squares in 2 ways, for example, as 112508449 + 20502784 = 10607^2 + 4528^2 .

It is a cyclic number.

It is not a de Polignac number, because 133011233 - 2⁴ = 133011217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133011239) 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, 56528 + ... + 58833.

It is an arithmetic number, because the mean of its divisors is an integer number (33281937).

Almost surely, 2^133011233 is an apocalyptic number.

It is an amenable number.

133011233 is a deficient number, since it is larger than the sum of its proper divisors (116515).

133011233 is a wasteful number, since it uses less digits than its factorization.

133011233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116514.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 133011233 is about 11533.0495967025. The cubic root of 133011233 is about 510.4612423463.

Adding to 133011233 its reverse (332110331), we get a palindrome (465121564).

The spelling of 133011233 in words is "one hundred thirty-three million, eleven thousand, two hundred thirty-three".