33153213 has 12 divisors (see below), whose sum is σ = 46958720. Its totient is φ = 20801472.

The previous prime is 33153209. The next prime is 33153251. The reversal of 33153213 is 31235133.

It is not a de Polignac number, because 33153213 - 2² = 33153209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33153213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33153013) 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, 18253 + ... + 19986.

Almost surely, 2^33153213 is an apocalyptic number.

It is an amenable number.

33153213 is a deficient number, since it is larger than the sum of its proper divisors (13805507).

33153213 is a wasteful number, since it uses less digits than its factorization.

33153213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38276 (or 38259 counting only the distinct ones).

The product of its digits is 810, while the sum is 21.

The square root of 33153213 is about 5757.8826837649. The cubic root of 33153213 is about 321.2490667003.

Adding to 33153213 its reverse (31235133), we get a palindrome (64388346).

The spelling of 33153213 in words is "thirty-three million, one hundred fifty-three thousand, two hundred thirteen".