22542225 has 36 divisors (see below), whose sum is σ = 38341296. Its totient is φ = 11685440.

The previous prime is 22542209. The next prime is 22542229. The reversal of 22542225 is 52224522.

It is a happy number.

It is not a de Polignac number, because 22542225 - 2⁴ = 22542209 is a prime.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22542195 and 22542204.

It is not an unprimeable number, because it can be changed into a prime (22542229) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 210622 + ... + 210728.

It is an arithmetic number, because the mean of its divisors is an integer number (1065036).

Almost surely, 2^22542225 is an apocalyptic number.

22542225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22542225 is a deficient number, since it is larger than the sum of its proper divisors (15799071).

22542225 is a wasteful number, since it uses less digits than its factorization.

22542225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 168 counting only the distinct ones).

The product of its digits is 3200, while the sum is 24.

The square root of 22542225 is about 4747.8653097998. The cubic root of 22542225 is about 282.4872994003.

Adding to 22542225 its reverse (52224522), we get a palindrome (74766747).

The spelling of 22542225 in words is "twenty-two million, five hundred forty-two thousand, two hundred twenty-five".