133304431 has 8 divisors (see below), whose sum is σ = 143907120. Its totient is φ = 122751552.

The previous prime is 133304419. The next prime is 133304471. The reversal of 133304431 is 134403331.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133304431 is a prime.

It is a super-2 number, since 2×133304431² = 35540142648467522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133304411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6790 + ... + 17683.

It is an arithmetic number, because the mean of its divisors is an integer number (17988390).

Almost surely, 2^133304431 is an apocalyptic number.

133304431 is a deficient number, since it is larger than the sum of its proper divisors (10602689).

133304431 is a wasteful number, since it uses less digits than its factorization.

133304431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24905.

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

The square root of 133304431 is about 11545.7538082188. The cubic root of 133304431 is about 510.8360387104.

Adding to 133304431 its reverse (134403331), we get a palindrome (267707762).

The spelling of 133304431 in words is "one hundred thirty-three million, three hundred four thousand, four hundred thirty-one".