133404213 has 4 divisors (see below), whose sum is σ = 177872288. Its totient is φ = 88936140.

The previous prime is 133404143. The next prime is 133404217. The reversal of 133404213 is 312404331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 133404213 - 2⁸ = 133403957 is a prime.

It is a super-2 number, since 2×133404213² = 35593368092298738, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 133404213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133404217) 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 in 3 ways as a sum of consecutive naturals, for example, 22234033 + ... + 22234038.

It is an arithmetic number, because the mean of its divisors is an integer number (44468072).

Almost surely, 2^133404213 is an apocalyptic number.

It is an amenable number.

133404213 is a deficient number, since it is larger than the sum of its proper divisors (44468075).

133404213 is an equidigital number, since it uses as much as digits as its factorization.

133404213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44468074.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 133404213 is about 11550.0741556061. The cubic root of 133404213 is about 510.9634651545.

Adding to 133404213 its reverse (312404331), we get a palindrome (445808544).

The spelling of 133404213 in words is "one hundred thirty-three million, four hundred four thousand, two hundred thirteen".