33225213 has 32 divisors (see below), whose sum is σ = 53049600. Its totient is φ = 18095616.

The previous prime is 33225209. The next prime is 33225221. The reversal of 33225213 is 31252233.

It is not a de Polignac number, because 33225213 - 2² = 33225209 is a prime.

It is a super-2 number, since 2×33225213² = 2207829557790738, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 33225213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33225253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53895 + ... + 54507.

It is an arithmetic number, because the mean of its divisors is an integer number (1657800).

Almost surely, 2^33225213 is an apocalyptic number.

It is an amenable number.

33225213 is a deficient number, since it is larger than the sum of its proper divisors (19824387).

33225213 is a wasteful number, since it uses less digits than its factorization.

33225213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741.

The product of its digits is 1080, while the sum is 21.

The square root of 33225213 is about 5764.1315911419. The cubic root of 33225213 is about 321.4814545229.

Adding to 33225213 its reverse (31252233), we get a palindrome (64477446).

The spelling of 33225213 in words is "thirty-three million, two hundred twenty-five thousand, two hundred thirteen".