33221136 has 40 divisors (see below), whose sum is σ = 92424640. Its totient is φ = 10221696.

The previous prime is 33221093. The next prime is 33221137. The reversal of 33221136 is 63112233.

It is a super-2 number, since 2×33221136² = 2207287754260992, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (33221137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25996 + ... + 27243.

It is an arithmetic number, because the mean of its divisors is an integer number (2310616).

Almost surely, 2^33221136 is an apocalyptic number.

It is an amenable number.

33221136 is an abundant number, since it is smaller than the sum of its proper divisors (59203504).

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

33221136 is a wasteful number, since it uses less digits than its factorization.

33221136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53263 (or 53257 counting only the distinct ones).

The product of its digits is 648, while the sum is 21.

The square root of 33221136 is about 5763.7779277137. Note that the first 3 decimals coincide. The cubic root of 33221136 is about 321.4683045344.

Adding to 33221136 its reverse (63112233), we get a palindrome (96333369).

The spelling of 33221136 in words is "thirty-three million, two hundred twenty-one thousand, one hundred thirty-six".