133133213 has 2 divisors, whose sum is σ = 133133214. Its totient is φ = 133133212.

The previous prime is 133133207. The next prime is 133133233. The reversal of 133133213 is 312331331.

It is an a-pointer prime, because the next prime (133133233) can be obtained adding 133133213 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124055044 + 9078169 = 11138^2 + 3013^2 .

It is a cyclic number.

It is not a de Polignac number, because 133133213 - 2⁴ = 133133197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133133233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66566606 + 66566607.

It is an arithmetic number, because the mean of its divisors is an integer number (66566607).

Almost surely, 2^133133213 is an apocalyptic number.

It is an amenable number.

133133213 is a deficient number, since it is larger than the sum of its proper divisors (1).

133133213 is an equidigital number, since it uses as much as digits as its factorization.

133133213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486, while the sum is 20.

The square root of 133133213 is about 11538.3366652217. The cubic root of 133133213 is about 510.6172367853.

Adding to 133133213 its reverse (312331331), we get a palindrome (445464544).

The spelling of 133133213 in words is "one hundred thirty-three million, one hundred thirty-three thousand, two hundred thirteen".