22663225 has 24 divisors (see below), whose sum is σ = 30544920. Its totient is φ = 16581120.

The previous prime is 22663213. The next prime is 22663229. The reversal of 22663225 is 52236622.

It can be written as a sum of positive squares in 12 ways, for example, as 5531904 + 17131321 = 2352^2 + 4139^2 .

It is not a de Polignac number, because 22663225 - 2¹⁵ = 22630457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22663193 and 22663202.

It is not an unprimeable number, because it can be changed into a prime (22663229) 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, 44271 + ... + 44779.

It is an arithmetic number, because the mean of its divisors is an integer number (1272705).

Almost surely, 2^22663225 is an apocalyptic number.

22663225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

22663225 is the 2545-th nonagonal number.

It is an amenable number.

22663225 is a deficient number, since it is larger than the sum of its proper divisors (7881695).

22663225 is a wasteful number, since it uses less digits than its factorization.

22663225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669 (or 664 counting only the distinct ones).

The product of its digits is 8640, while the sum is 28.

The square root of 22663225 is about 4760.5908246771. The cubic root of 22663225 is about 282.9918338489.

Adding to 22663225 its reverse (52236622), we get a palindrome (74899847).

The spelling of 22663225 in words is "twenty-two million, six hundred sixty-three thousand, two hundred twenty-five".