33889221 has 12 divisors (see below), whose sum is σ = 49754380. Its totient is φ = 22222080.

The previous prime is 33889201. The next prime is 33889249. The reversal of 33889221 is 12298833.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17969121 + 15920100 = 4239^2 + 3990^2 .

It is not a de Polignac number, because 33889221 - 2⁶ = 33889157 is a prime.

It is a super-2 number, since 2×33889221² = 2296958599973682, 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 (33889201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30316 + ... + 31413.

Almost surely, 2^33889221 is an apocalyptic number.

It is an amenable number.

33889221 is a deficient number, since it is larger than the sum of its proper divisors (15865159).

33889221 is a wasteful number, since it uses less digits than its factorization.

33889221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61796 (or 61793 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 33889221 is about 5821.4449237281. Note that the first 3 decimals coincide. The cubic root of 33889221 is about 323.6089532335.

The spelling of 33889221 in words is "thirty-three million, eight hundred eighty-nine thousand, two hundred twenty-one".