133303217 has 2 divisors, whose sum is σ = 133303218. Its totient is φ = 133303216.

The previous prime is 133303211. The next prime is 133303237. The reversal of 133303217 is 712303331.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114083761 + 19219456 = 10681^2 + 4384^2 .

It is a cyclic number.

It is not a de Polignac number, because 133303217 - 2⁶ = 133303153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133303192 and 133303201.

It is not a weakly prime, because it can be changed into another prime (133303211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66651608 + 66651609.

It is an arithmetic number, because the mean of its divisors is an integer number (66651609).

Almost surely, 2^133303217 is an apocalyptic number.

It is an amenable number.

133303217 is a deficient number, since it is larger than the sum of its proper divisors (1).

133303217 is an equidigital number, since it uses as much as digits as its factorization.

133303217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 23.

The square root of 133303217 is about 11545.7012346587. The cubic root of 133303217 is about 510.8344879822.

Adding to 133303217 its reverse (712303331), we get a palindrome (845606548).

The spelling of 133303217 in words is "one hundred thirty-three million, three hundred three thousand, two hundred seventeen".