22308225 has 24 divisors (see below), whose sum is σ = 37884480. Its totient is φ = 11574720.

The previous prime is 22308217. The next prime is 22308239. The reversal of 22308225 is 52280322.

It is not a de Polignac number, because 22308225 - 2³ = 22308217 is a prime.

It is a super-3 number, since 3×22308225³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22308195 and 22308204.

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, 1245 + ... + 6794.

It is an arithmetic number, because the mean of its divisors is an integer number (1578520).

Almost surely, 2^22308225 is an apocalyptic number.

22308225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22308225 is a deficient number, since it is larger than the sum of its proper divisors (15576255).

22308225 is a wasteful number, since it uses less digits than its factorization.

22308225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8089 (or 8084 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 22308225 is about 4723.1583712596. The cubic root of 22308225 is about 281.5064426487.

Adding to 22308225 its reverse (52280322), we get a palindrome (74588547).

The spelling of 22308225 in words is "twenty-two million, three hundred eight thousand, two hundred twenty-five".