213321133 has 4 divisors (see below), whose sum is σ = 216325728. Its totient is φ = 210316540.

The previous prime is 213321127. The next prime is 213321161. The reversal of 213321133 is 331123312.

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 a cyclic number.

It is not a de Polignac number, because 213321133 - 2⁹ = 213320621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213321133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213321533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1502191 + ... + 1502332.

It is an arithmetic number, because the mean of its divisors is an integer number (54081432).

Almost surely, 2^213321133 is an apocalyptic number.

It is an amenable number.

213321133 is a deficient number, since it is larger than the sum of its proper divisors (3004595).

213321133 is an equidigital number, since it uses as much as digits as its factorization.

213321133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3004594.

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

The square root of 213321133 is about 14605.5172109720. The cubic root of 213321133 is about 597.5092421089.

Adding to 213321133 its reverse (331123312), we get a palindrome (544444445).

The spelling of 213321133 in words is "two hundred thirteen million, three hundred twenty-one thousand, one hundred thirty-three".