33221131 has 8 divisors (see below), whose sum is σ = 34736544. Its totient is φ = 31711680.

The previous prime is 33221093. The next prime is 33221137. The reversal of 33221131 is 13112233.

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 33221131 - 2⁷ = 33221003 is a prime.

It is a super-2 number, since 2×33221131² = 2207287089838322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33221137) 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, 13021 + ... + 15361.

It is an arithmetic number, because the mean of its divisors is an integer number (4342068).

Almost surely, 2^33221131 is an apocalyptic number.

33221131 is a deficient number, since it is larger than the sum of its proper divisors (1515413).

33221131 is a wasteful number, since it uses less digits than its factorization.

33221131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2981.

The product of its digits is 108, while the sum is 16.

The square root of 33221131 is about 5763.7774939704. Note that the first 3 decimals coincide. The cubic root of 33221131 is about 321.4682884067.

Adding to 33221131 its reverse (13112233), we get a palindrome (46333364).

The spelling of 33221131 in words is "thirty-three million, two hundred twenty-one thousand, one hundred thirty-one".