133213303 has 4 divisors (see below), whose sum is σ = 133239640. Its totient is φ = 133186968.

The previous prime is 133213277. The next prime is 133213337. The reversal of 133213303 is 303312331.

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

It is a cyclic number.

It is not a de Polignac number, because 133213303 - 2⁵ = 133213271 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 (133213363) 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 3 ways as a sum of consecutive naturals, for example, 2925 + ... + 16582.

It is an arithmetic number, because the mean of its divisors is an integer number (33309910).

Almost surely, 2^133213303 is an apocalyptic number.

133213303 is a deficient number, since it is larger than the sum of its proper divisors (26337).

133213303 is an equidigital number, since it uses as much as digits as its factorization.

133213303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26336.

The product of its (nonzero) digits is 486, while the sum is 19.

The square root of 133213303 is about 11541.8067476457. The cubic root of 133213303 is about 510.7196082765.

Adding to 133213303 its reverse (303312331), we get a palindrome (436525634).

The spelling of 133213303 in words is "one hundred thirty-three million, two hundred thirteen thousand, three hundred three".