33211213 has 4 divisors (see below), whose sum is σ = 37955680. Its totient is φ = 28466748.

The previous prime is 33211193. The next prime is 33211219. The reversal of 33211213 is 31211233.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31211233 = 983 ⋅31751.

It is a cyclic number.

It is not a de Polignac number, because 33211213 - 2⁵ = 33211181 is a prime.

It is a super-2 number, since 2×33211213² = 2205969337862738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33211219) 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, 2372223 + ... + 2372236.

It is an arithmetic number, because the mean of its divisors is an integer number (9488920).

Almost surely, 2^33211213 is an apocalyptic number.

It is an amenable number.

33211213 is a deficient number, since it is larger than the sum of its proper divisors (4744467).

33211213 is an equidigital number, since it uses as much as digits as its factorization.

33211213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4744466.

The product of its digits is 108, while the sum is 16.

The square root of 33211213 is about 5762.9170564914. The cubic root of 33211213 is about 321.4362943141.

Adding to 33211213 its reverse (31211233), we get a palindrome (64422446).

The spelling of 33211213 in words is "thirty-three million, two hundred eleven thousand, two hundred thirteen".