133031333 has 6 divisors (see below), whose sum is σ = 139067334. Its totient is φ = 127246856.

The previous prime is 133031299. The next prime is 133031377. The reversal of 133031333 is 333130331.

It can be written as a sum of positive squares in only one way, i.e., 80874049 + 52157284 = 8993^2 + 7222^2 .

It is not a de Polignac number, because 133031333 - 2⁸ = 133031077 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 (133036333) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 125210 + ... + 126267.

It is an arithmetic number, because the mean of its divisors is an integer number (23177889).

Almost surely, 2^133031333 is an apocalyptic number.

It is an amenable number.

133031333 is a deficient number, since it is larger than the sum of its proper divisors (6036001).

133031333 is an equidigital number, since it uses as much as digits as its factorization.

133031333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251523 (or 251500 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 20.

The square root of 133031333 is about 11533.9209725054. The cubic root of 133031333 is about 510.4869538443.

Adding to 133031333 its reverse (333130331), we get a palindrome (466161664).

The spelling of 133031333 in words is "one hundred thirty-three million, thirty-one thousand, three hundred thirty-three".