22142225 has 24 divisors (see below), whose sum is σ = 32468160. Its totient is φ = 14656320.

The previous prime is 22142213. The next prime is 22142231. The reversal of 22142225 is 52224122.

It is not a de Polignac number, because 22142225 - 2⁶ = 22142161 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22142197 and 22142206.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2894 + ... + 7256.

It is an arithmetic number, because the mean of its divisors is an integer number (1352840).

Almost surely, 2^22142225 is an apocalyptic number.

22142225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22142225 is a deficient number, since it is larger than the sum of its proper divisors (10325935).

22142225 is a wasteful number, since it uses less digits than its factorization.

22142225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4409 (or 4404 counting only the distinct ones).

The product of its digits is 640, while the sum is 20.

The square root of 22142225 is about 4705.5525711653. The cubic root of 22142225 is about 280.8064547843.

Adding to 22142225 its reverse (52224122), we get a palindrome (74366347).

The spelling of 22142225 in words is "twenty-two million, one hundred forty-two thousand, two hundred twenty-five".