133133303 has 4 divisors (see below), whose sum is σ = 133830528. Its totient is φ = 132436080.

The previous prime is 133133291. The next prime is 133133317. The reversal of 133133303 is 303331331.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133133303 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 (133133383) 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, 348326 + ... + 348707.

It is an arithmetic number, because the mean of its divisors is an integer number (33457632).

Almost surely, 2^133133303 is an apocalyptic number.

133133303 is a deficient number, since it is larger than the sum of its proper divisors (697225).

133133303 is an equidigital number, since it uses as much as digits as its factorization.

133133303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697224.

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

The square root of 133133303 is about 11538.3405652633. The cubic root of 133133303 is about 510.6173518468.

Adding to 133133303 its reverse (303331331), we get a palindrome (436464634).

The spelling of 133133303 in words is "one hundred thirty-three million, one hundred thirty-three thousand, three hundred three".