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2303221 = 5343457

2303221 has 4 divisors (see below), whose sum is σ = 2346732. Its totient is φ = 2259712.

The previous prime is 2303219. The next prime is 2303227. The reversal of 2303221 is 1223032.

It is a happy number.

2303221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1512900 + 790321 = 1230^2 + 889^2 .

It is a cyclic number.

It is not a de Polignac number, because 2303221 - 21 = 2303219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2303227) 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 3 ways as a sum of consecutive naturals, for example, 21676 + ... + 21781.

It is an arithmetic number, because the mean of its divisors is an integer number (586683).

22303221 is an apocalyptic number.

It is an amenable number.

2303221 is a deficient number, since it is larger than the sum of its proper divisors (43511).

2303221 is an equidigital number, since it uses as much as digits as its factorization.

2303221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43510.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 2303221 is about 1517.6366495311. The cubic root of 2303221 is about 132.0622028535.

Adding to 2303221 its reverse (1223032), we get a palindrome (3526253).

The spelling of 2303221 in words is "two million, three hundred three thousand, two hundred twenty-one".

Divisors: 1 53 43457 2303221