133321303 has 4 divisors (see below), whose sum is σ = 133345080. Its totient is φ = 133297528.

The previous prime is 133321301. The next prime is 133321319. The reversal of 133321303 is 303123331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 303123331 = 7 ⋅43303333.

It is a cyclic number.

It is not a de Polignac number, because 133321303 - 2¹ = 133321301 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 (133321301) 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, 1701 + ... + 16417.

It is an arithmetic number, because the mean of its divisors is an integer number (33336270).

Almost surely, 2^133321303 is an apocalyptic number.

133321303 is a deficient number, since it is larger than the sum of its proper divisors (23777).

133321303 is an equidigital number, since it uses as much as digits as its factorization.

133321303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23776.

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

The square root of 133321303 is about 11546.4844433273. The cubic root of 133321303 is about 510.8575895371.

Adding to 133321303 its reverse (303123331), we get a palindrome (436444634).

The spelling of 133321303 in words is "one hundred thirty-three million, three hundred twenty-one thousand, three hundred three".