33222240 has 72 divisors (see below), whose sum is σ = 113375808. Its totient is φ = 8858880.

The previous prime is 33222239. The next prime is 33222253. The reversal of 33222240 is 4222233.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×33222240² = 2207434461235200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10096 + ... + 12975.

It is an arithmetic number, because the mean of its divisors is an integer number (1574664).

Almost surely, 2^33222240 is an apocalyptic number.

33222240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33222240 is an abundant number, since it is smaller than the sum of its proper divisors (80153568).

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

33222240 is a wasteful number, since it uses less digits than its factorization.

33222240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23092 (or 23081 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 33222240 is about 5763.8736974365. The cubic root of 33222240 is about 321.4718654911.

Adding to 33222240 its reverse (4222233), we get a palindrome (37444473).

The spelling of 33222240 in words is "thirty-three million, two hundred twenty-two thousand, two hundred forty".