133440331 has 2 divisors, whose sum is σ = 133440332. Its totient is φ = 133440330.

The previous prime is 133440323. The next prime is 133440341. The reversal of 133440331 is 133044331.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133440331 - 2³ = 133440323 is a prime.

It is a super-2 number, since 2×133440331² = 35612643874779122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (133440341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66720165 + 66720166.

It is an arithmetic number, because the mean of its divisors is an integer number (66720166).

Almost surely, 2^133440331 is an apocalyptic number.

133440331 is a deficient number, since it is larger than the sum of its proper divisors (1).

133440331 is an equidigital number, since it uses as much as digits as its factorization.

133440331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 133440331 is about 11551.6375895368. The cubic root of 133440331 is about 511.0095739261.

Adding to 133440331 its reverse (133044331), we get a palindrome (266484662).

The spelling of 133440331 in words is "one hundred thirty-three million, four hundred forty thousand, three hundred thirty-one".