33247213 has 8 divisors (see below), whose sum is σ = 35500608. Its totient is φ = 31061184.

The previous prime is 33247163. The next prime is 33247217. The reversal of 33247213 is 31274233.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33247213 - 2⁹ = 33246701 is a prime.

It is a super-2 number, since 2×33247213² = 2210754344534738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33247217) 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 7 ways as a sum of consecutive naturals, for example, 15820 + ... + 17797.

It is an arithmetic number, because the mean of its divisors is an integer number (4437576).

Almost surely, 2^33247213 is an apocalyptic number.

It is an amenable number.

33247213 is a deficient number, since it is larger than the sum of its proper divisors (2253395).

33247213 is a wasteful number, since it uses less digits than its factorization.

33247213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33683.

The product of its digits is 3024, while the sum is 25.

The square root of 33247213 is about 5766.0396287226. The cubic root of 33247213 is about 321.5523949414.

The spelling of 33247213 in words is "thirty-three million, two hundred forty-seven thousand, two hundred thirteen".