133433331 has 16 divisors (see below), whose sum is σ = 185349120. Its totient is φ = 85289760.

The previous prime is 133433317. The next prime is 133433347. The reversal of 133433331 is 133334331.

It is not a de Polignac number, because 133433331 - 2⁷ = 133433203 is a prime.

It is a super-2 number, since 2×133433331² = 35608907643511122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133433351) 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 15 ways as a sum of consecutive naturals, for example, 3556 + ... + 16718.

It is an arithmetic number, because the mean of its divisors is an integer number (11584320).

Almost surely, 2^133433331 is an apocalyptic number.

133433331 is a deficient number, since it is larger than the sum of its proper divisors (51915789).

133433331 is a wasteful number, since it uses less digits than its factorization.

133433331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13306.

The product of its digits is 2916, while the sum is 24.

The square root of 133433331 is about 11551.3345982185. The cubic root of 133433331 is about 511.0006382729. Note that the first 3 decimals are identical.

Adding to 133433331 its reverse (133334331), we get a palindrome (266767662).

The spelling of 133433331 in words is "one hundred thirty-three million, four hundred thirty-three thousand, three hundred thirty-one".