33224821 has 8 divisors (see below), whose sum is σ = 38024640. Its totient is φ = 28438368.

The previous prime is 33224819. The next prime is 33224827. The reversal of 33224821 is 12842233.

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

It is not a de Polignac number, because 33224821 - 2¹ = 33224819 is a prime.

It is a super-2 number, since 2×33224821² = 2207777460964082, 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 (33224827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2730 + ... + 8596.

It is an arithmetic number, because the mean of its divisors is an integer number (4753080).

Almost surely, 2^33224821 is an apocalyptic number.

It is an amenable number.

33224821 is a deficient number, since it is larger than the sum of its proper divisors (4799819).

33224821 is an equidigital number, since it uses as much as digits as its factorization.

33224821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6683.

The product of its digits is 2304, while the sum is 25.

The square root of 33224821 is about 5764.0975876541. The cubic root of 33224821 is about 321.4801902097.

The spelling of 33224821 in words is "thirty-three million, two hundred twenty-four thousand, eight hundred twenty-one".