22547449 has 2 divisors, whose sum is σ = 22547450. Its totient is φ = 22547448.

The previous prime is 22547411. The next prime is 22547461. The reversal of 22547449 is 94474522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21455424 + 1092025 = 4632^2 + 1045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22547449 is a prime.

It is not a weakly prime, because it can be changed into another prime (22547489) 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 as a sum of consecutive naturals, namely, 11273724 + 11273725.

It is an arithmetic number, because the mean of its divisors is an integer number (11273725).

Almost surely, 2^22547449 is an apocalyptic number.

It is an amenable number.

22547449 is a deficient number, since it is larger than the sum of its proper divisors (1).

22547449 is an equidigital number, since it uses as much as digits as its factorization.

22547449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 37.

The square root of 22547449 is about 4748.4154199059. The cubic root of 22547449 is about 282.5091191877.

It can be divided in two parts, 225 and 47449, that added together give a palindrome (47674).

The spelling of 22547449 in words is "twenty-two million, five hundred forty-seven thousand, four hundred forty-nine".