22043225 has 6 divisors (see below), whose sum is σ = 27333630. Its totient is φ = 17634560.

The previous prime is 22043213. The next prime is 22043227. The reversal of 22043225 is 52234022.

It can be written as a sum of positive squares in 3 ways, for example, as 1149184 + 20894041 = 1072^2 + 4571^2 .

It is not a de Polignac number, because 22043225 - 2¹⁴ = 22026841 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22043197 and 22043206.

It is not an unprimeable number, because it can be changed into a prime (22043227) 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 5 ways as a sum of consecutive naturals, for example, 440840 + ... + 440889.

It is an arithmetic number, because the mean of its divisors is an integer number (4555605).

Almost surely, 2^22043225 is an apocalyptic number.

22043225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22043225 is a deficient number, since it is larger than the sum of its proper divisors (5290405).

22043225 is an equidigital number, since it uses as much as digits as its factorization.

22043225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881739 (or 881734 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 22043225 is about 4695.0212992062. The cubic root of 22043225 is about 280.3873253585.

Adding to 22043225 its reverse (52234022), we get a palindrome (74277247).

It can be divided in two parts, 22043 and 225, that multiplied together give a triangular number (4959675 = T₃₁₄₉).

The spelling of 22043225 in words is "twenty-two million, forty-three thousand, two hundred twenty-five".