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33213 = 311071

33213 has 4 divisors (see below), whose sum is σ = 44288. Its totient is φ = 22140.

The previous prime is 33211. The next prime is 33223. The reversal of 33213 is 31233.

Adding to 33213 its reverse (31233), we get a palindrome (64446).

It is a happy number.

33213 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 33213 - 21 = 33211 is a prime.

It is a super-2 number, since 2×332132 = 2206206738, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33211) 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, 5533 + ... + 5538.

It is an arithmetic number, because the mean of its divisors is an integer number (11072).

233213 is an apocalyptic number.

It is an amenable number.

33213 is a deficient number, since it is larger than the sum of its proper divisors (11075).

33213 is a wasteful number, since it uses less digits than its factorization.

33213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11074.

The product of its digits is 54, while the sum is 12.

The square root of 33213 is about 182.2443414759. The cubic root of 33213 is about 32.1442059399.

The spelling of 33213 in words is "thirty-three thousand, two hundred thirteen".

Divisors: 1 3 11071 33213