133213213 has 12 divisors (see below), whose sum is σ = 155213280. Its totient is φ = 113997912.

The previous prime is 133213189. The next prime is 133213229. The reversal of 133213213 is 312312331.

It is not a de Polignac number, because 133213213 - 2⁹ = 133212701 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 (133213273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34578 + ... + 38236.

It is an arithmetic number, because the mean of its divisors is an integer number (12934440).

Almost surely, 2^133213213 is an apocalyptic number.

It is an amenable number.

133213213 is a deficient number, since it is larger than the sum of its proper divisors (22000067).

133213213 is an equidigital number, since it uses as much as digits as its factorization.

133213213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4416 (or 4409 counting only the distinct ones).

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

The square root of 133213213 is about 11541.8028487754. The cubic root of 133213213 is about 510.7194932610.

Adding to 133213213 its reverse (312312331), we get a palindrome (445525544).

The spelling of 133213213 in words is "one hundred thirty-three million, two hundred thirteen thousand, two hundred thirteen".