33103213 has 12 divisors (see below), whose sum is σ = 39106368. Its totient is φ = 27777360.

The previous prime is 33103207. The next prime is 33103219. The reversal of 33103213 is 31230133.

It is an interprime number because it is at equal distance from previous prime (33103207) and next prime (33103219).

It is not a de Polignac number, because 33103213 - 2⁹ = 33102701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33103219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7045 + ... + 10762.

It is an arithmetic number, because the mean of its divisors is an integer number (3258864).

Almost surely, 2^33103213 is an apocalyptic number.

It is an amenable number.

33103213 is a deficient number, since it is larger than the sum of its proper divisors (6003155).

33103213 is a wasteful number, since it uses less digits than its factorization.

33103213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17844 (or 17831 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 16.

The square root of 33103213 is about 5753.5391716751. The cubic root of 33103213 is about 321.0874882437.

Adding to 33103213 its reverse (31230133), we get a palindrome (64333346).

Subtracting from 33103213 its reverse (31230133), we obtain a triangular number (1873080 = T₁₉₃₅).

The spelling of 33103213 in words is "thirty-three million, one hundred three thousand, two hundred thirteen".