133042213 has 4 divisors (see below), whose sum is σ = 133118860. Its totient is φ = 132965568.

The previous prime is 133042211. The next prime is 133042219. The reversal of 133042213 is 312240331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50722884 + 82319329 = 7122^2 + 9073^2 .

It is a cyclic number.

It is not a de Polignac number, because 133042213 - 2¹ = 133042211 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 (133042211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35658 + ... + 39211.

It is an arithmetic number, because the mean of its divisors is an integer number (33279715).

Almost surely, 2^133042213 is an apocalyptic number.

It is an amenable number.

133042213 is a deficient number, since it is larger than the sum of its proper divisors (76647).

133042213 is an equidigital number, since it uses as much as digits as its factorization.

133042213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76646.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 133042213 is about 11534.3926151315. The cubic root of 133042213 is about 510.5008702316.

Adding to 133042213 its reverse (312240331), we get a palindrome (445282544).

The spelling of 133042213 in words is "one hundred thirty-three million, forty-two thousand, two hundred thirteen".