2231289 has 24 divisors (see below), whose sum is σ = 3407040. Its totient is φ = 1405152.

The previous prime is 2231279. The next prime is 2231293. The reversal of 2231289 is 9821322.

It is a happy number.

2231289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2231289 - 2⁹ = 2230777 is a prime.

It is a super-3 number, since 3×2231289³ = 33326424966051571707, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231209) 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 23 ways as a sum of consecutive naturals, for example, 21612 + ... + 21714.

It is an arithmetic number, because the mean of its divisors is an integer number (141960).

2^2231289 is an apocalyptic number.

2231289 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2231289 is a deficient number, since it is larger than the sum of its proper divisors (1175751).

2231289 is a wasteful number, since it uses less digits than its factorization.

2231289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221 (or 218 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 2231289 is about 1493.7499790795. The cubic root of 2231289 is about 130.6728233887.

The spelling of 2231289 in words is "two million, two hundred thirty-one thousand, two hundred eighty-nine".