133312213 has 2 divisors, whose sum is σ = 133312214. Its totient is φ = 133312212.

The previous prime is 133312199. The next prime is 133312229. The reversal of 133312213 is 312213331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79245604 + 54066609 = 8902^2 + 7353^2 .

It is a cyclic number.

It is not a de Polignac number, because 133312213 - 2⁹ = 133311701 is a prime.

It is a super-2 number, since 2×133312213² = 35544292269914738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133312253) 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 as a sum of consecutive naturals, namely, 66656106 + 66656107.

It is an arithmetic number, because the mean of its divisors is an integer number (66656107).

Almost surely, 2^133312213 is an apocalyptic number.

It is an amenable number.

133312213 is a deficient number, since it is larger than the sum of its proper divisors (1).

133312213 is an equidigital number, since it uses as much as digits as its factorization.

133312213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 19.

The square root of 133312213 is about 11546.0908103132. The cubic root of 133312213 is about 510.8459789869.

Adding to 133312213 its reverse (312213331), we get a palindrome (445525544).

The spelling of 133312213 in words is "one hundred thirty-three million, three hundred twelve thousand, two hundred thirteen".