33224540 has 24 divisors (see below), whose sum is σ = 73444560. Its totient is φ = 12590208.

The previous prime is 33224519. The next prime is 33224549. The reversal of 33224540 is 4542233.

It is a super-2 number, since 2×33224540² = 2207740116423200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33224549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43337 + ... + 44096.

It is an arithmetic number, because the mean of its divisors is an integer number (3060190).

Almost surely, 2^33224540 is an apocalyptic number.

It is an amenable number.

33224540 is an abundant number, since it is smaller than the sum of its proper divisors (40220020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33224540 is a wasteful number, since it uses less digits than its factorization.

33224540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87461 (or 87459 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 33224540 is about 5764.0732125815. The cubic root of 33224540 is about 321.4792838974.

Adding to 33224540 its reverse (4542233), we get a palindrome (37766773).

The spelling of 33224540 in words is "thirty-three million, two hundred twenty-four thousand, five hundred forty".