33012213 has 16 divisors (see below), whose sum is σ = 47523840. Its totient is φ = 20263104.

The previous prime is 33012209. The next prime is 33012223. The reversal of 33012213 is 31221033.

It is not a de Polignac number, because 33012213 - 2² = 33012209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 33012192 and 33012201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33012223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19020 + ... + 20682.

It is an arithmetic number, because the mean of its divisors is an integer number (2970240).

Almost surely, 2^33012213 is an apocalyptic number.

It is an amenable number.

33012213 is a deficient number, since it is larger than the sum of its proper divisors (14511627).

33012213 is a wasteful number, since it uses less digits than its factorization.

33012213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 33012213 is about 5745.6255534102. The cubic root of 33012213 is about 320.7929974290.

Adding to 33012213 its reverse (31221033), we get a palindrome (64233246).

The spelling of 33012213 in words is "thirty-three million, twelve thousand, two hundred thirteen".