133305503 has 2 divisors, whose sum is σ = 133305504. Its totient is φ = 133305502.

The previous prime is 133305481. The next prime is 133305509. The reversal of 133305503 is 305503331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133305503 - 2⁶ = 133305439 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133305509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66652751 + 66652752.

It is an arithmetic number, because the mean of its divisors is an integer number (66652752).

Almost surely, 2^133305503 is an apocalyptic number.

133305503 is a deficient number, since it is larger than the sum of its proper divisors (1).

133305503 is an equidigital number, since it uses as much as digits as its factorization.

133305503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2025, while the sum is 23.

The square root of 133305503 is about 11545.8002321190. The cubic root of 133305503 is about 510.8374080441.

Adding to 133305503 its reverse (305503331), we get a palindrome (438808834).

The spelling of 133305503 in words is "one hundred thirty-three million, three hundred five thousand, five hundred three".