22118025 has 24 divisors (see below), whose sum is σ = 37041280. Its totient is φ = 11643840.

The previous prime is 22118023. The next prime is 22118029. The reversal of 22118025 is 52081122.

It is a happy number.

It is not a de Polignac number, because 22118025 - 2¹ = 22118023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22117992 and 22118010.

It is not an unprimeable number, because it can be changed into a prime (22118021) 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 in 23 ways as a sum of consecutive naturals, for example, 4059 + ... + 7791.

Almost surely, 2^22118025 is an apocalyptic number.

22118025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22118025 is a deficient number, since it is larger than the sum of its proper divisors (14923255).

22118025 is a wasteful number, since it uses less digits than its factorization.

22118025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3825 (or 3820 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 22118025 is about 4702.9804379776. The cubic root of 22118025 is about 280.7041164783.

Adding to 22118025 its reverse (52081122), we get a palindrome (74199147).

The spelling of 22118025 in words is "twenty-two million, one hundred eighteen thousand, twenty-five".