22317225 has 24 divisors (see below), whose sum is σ = 42169920. Its totient is φ = 10201920.

The previous prime is 22317223. The next prime is 22317233. The reversal of 22317225 is 52271322.

It is a happy number.

It is not a de Polignac number, because 22317225 - 2¹ = 22317223 is a prime.

It is a super-3 number, since 3×22317225³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22317195 and 22317204.

It is not an unprimeable number, because it can be changed into a prime (22317223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20730 + ... + 21779.

It is an arithmetic number, because the mean of its divisors is an integer number (1757080).

Almost surely, 2^22317225 is an apocalyptic number.

22317225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22317225 is a deficient number, since it is larger than the sum of its proper divisors (19852695).

22317225 is a wasteful number, since it uses less digits than its factorization.

22317225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42529 (or 42524 counting only the distinct ones).

The product of its digits is 1680, while the sum is 24.

The square root of 22317225 is about 4724.1110274844. Note that the first 3 decimals coincide. The cubic root of 22317225 is about 281.5442944179.

Adding to 22317225 its reverse (52271322), we get a palindrome (74588547).

The spelling of 22317225 in words is "twenty-two million, three hundred seventeen thousand, two hundred twenty-five".