22708225 has 12 divisors (see below), whose sum is σ = 28282540. Its totient is φ = 18086400.

The previous prime is 22708223. The next prime is 22708237. The reversal of 22708225 is 52280722.

It can be written as a sum of positive squares in 6 ways, for example, as 646416 + 22061809 = 804^2 + 4697^2 .

It is not a de Polignac number, because 22708225 - 2¹ = 22708223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22708193 and 22708202.

It is not an unprimeable number, because it can be changed into a prime (22708223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4141 + ... + 7909.

It is a Proth number, since it is equal to 693 ⋅ 2¹⁵ + 1 and 693 < 2¹⁵.

Almost surely, 2^22708225 is an apocalyptic number.

22708225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22708225 is a deficient number, since it is larger than the sum of its proper divisors (5574315).

22708225 is a wasteful number, since it uses less digits than its factorization.

22708225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4020 (or 4015 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 22708225 is about 4765.3147849854. The cubic root of 22708225 is about 283.1790124639.

Adding to 22708225 its reverse (52280722), we get a palindrome (74988947).

The spelling of 22708225 in words is "twenty-two million, seven hundred eight thousand, two hundred twenty-five".