22281473 has 2 divisors, whose sum is σ = 22281474. Its totient is φ = 22281472.

The previous prime is 22281463. The next prime is 22281481. The reversal of 22281473 is 37418222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17581249 + 4700224 = 4193^2 + 2168^2 .

It is a cyclic number.

It is not a de Polignac number, because 22281473 - 2¹² = 22277377 is a prime.

It is not a weakly prime, because it can be changed into another prime (22281403) 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, 11140736 + 11140737.

It is an arithmetic number, because the mean of its divisors is an integer number (11140737).

Almost surely, 2^22281473 is an apocalyptic number.

It is an amenable number.

22281473 is a deficient number, since it is larger than the sum of its proper divisors (1).

22281473 is an equidigital number, since it uses as much as digits as its factorization.

22281473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 29.

The square root of 22281473 is about 4720.3255184362. The cubic root of 22281473 is about 281.3938702277.

Adding to 22281473 its reverse (37418222), we get a palindrome (59699695).

The spelling of 22281473 in words is "twenty-two million, two hundred eighty-one thousand, four hundred seventy-three".