133243303 has 4 divisors (see below), whose sum is σ = 134848728. Its totient is φ = 131637880.

The previous prime is 133243289. The next prime is 133243307. The reversal of 133243303 is 303342331.

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 133243303 - 2¹³ = 133235111 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 (133243307) 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, 802588 + ... + 802753.

It is an arithmetic number, because the mean of its divisors is an integer number (33712182).

Almost surely, 2^133243303 is an apocalyptic number.

133243303 is a deficient number, since it is larger than the sum of its proper divisors (1605425).

133243303 is an equidigital number, since it uses as much as digits as its factorization.

133243303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605424.

The product of its (nonzero) digits is 1944, while the sum is 22.

The square root of 133243303 is about 11543.1062976999. The cubic root of 133243303 is about 510.7579438829.

Adding to 133243303 its reverse (303342331), we get a palindrome (436585634).

The spelling of 133243303 in words is "one hundred thirty-three million, two hundred forty-three thousand, three hundred three".