22447 has 2 divisors, whose sum is σ = 22448. Its totient is φ = 22446.

The previous prime is 22441. The next prime is 22453. The reversal of 22447 is 74422.

It is a balanced prime because it is at equal distance from previous prime (22441) and next prime (22453).

It is a cyclic number.

It is not a de Polignac number, because 22447 - 2^{11} = 20399 is a prime.

It is a d-powerful number, because it can be written as **2**^{3} + **2**^{9} + **4**^{5} + **4**^{6} + **7**^{5} .

It is a plaindrome in base 10 and base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22441) 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 as a sum of consecutive naturals, namely, 11223 + 11224.

It is an arithmetic number, because the mean of its divisors is an integer number (11224).

22447 is the 87-th hex number.

22447 is a deficient number, since it is larger than the sum of its proper divisors (1).

22447 is an equidigital number, since it uses as much as digits as its factorization.

22447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 448, while the sum is 19.

The square root of 22447 is about 149.8232291736. The cubic root of 22447 is about 28.2088968123.

Adding to 22447 its reverse (74422), we get a palindrome (96869).

The spelling of 22447 in words is "twenty-two thousand, four hundred forty-seven", and thus it is an iban number.

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