33189121 has 9 divisors (see below), whose sum is σ = 38654721. Its totient is φ = 28413252.

The previous prime is 33189119. The next prime is 33189139. The reversal of 33189121 is 12198133.

The square root of 33189121 is 5761.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 33189121 - 2¹ = 33189119 is a prime.

It is a super-2 number, since 2×33189121² = 2203035505505282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33189121.

It is not an unprimeable number, because it can be changed into a prime (33189721) 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 8 ways as a sum of consecutive naturals, for example, 39916 + ... + 40738.

It is an arithmetic number, because the mean of its divisors is an integer number (4294969).

Almost surely, 2^33189121 is an apocalyptic number.

33189121 is the 5761-st square number.

33189121 is the 2881-st centered octagonal number.

It is an amenable number.

33189121 is a deficient number, since it is larger than the sum of its proper divisors (5465600).

33189121 is an frugal number, since it uses more digits than its factorization.

33189121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660 (or 830 counting only the distinct ones).

The product of its digits is 1296, while the sum is 28.

The cubic root of 33189121 is about 321.3650056829.

Multiplying 33189121 by its product of digits (1296), we get a square (43013100816 = 207396²).

The spelling of 33189121 in words is "thirty-three million, one hundred eighty-nine thousand, one hundred twenty-one".