22225 has 12 divisors (see below), whose sum is σ = 31744. Its totient is φ = 15120.

The previous prime is 22193. The next prime is 22229. The reversal of 22225 is 52222.

It is not a de Polignac number, because 22225 - 2⁵ = 22193 is a prime.

It is a Duffinian number.

22225 is a lucky number.

It is a plaindrome in base 10.

It is a nialpdrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112 + ... + 238.

2²²²²⁵ is an apocalyptic number.

22225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22225 is a deficient number, since it is larger than the sum of its proper divisors (9519).

22225 is a wasteful number, since it uses less digits than its factorization.

22225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 139 counting only the distinct ones).

The product of its digits is 80, while the sum is 13.

The square root of 22225 is about 149.0805151588. The cubic root of 22225 is about 28.1155935622.

Adding to 22225 its reverse (52222), we get a palindrome (74447).

It can be divided in two parts, 22 and 225, that multiplied together give a triangular number (4950 = T₉₉).

The spelling of 22225 in words is "twenty-two thousand, two hundred twenty-five".