22425 has 24 divisors (see below), whose sum is σ = 41664. Its totient is φ = 10560.

The previous prime is 22409. The next prime is 22433. The reversal of 22425 is 52422.

It is not a de Polignac number, because 22425 - 2⁴ = 22409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a plaindrome in base 7 and base 16.

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, 964 + ... + 986.

It is an arithmetic number, because the mean of its divisors is an integer number (1736).

2²²⁴²⁵ is an apocalyptic number.

22425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22425 is a deficient number, since it is larger than the sum of its proper divisors (19239).

22425 is a wasteful number, since it uses less digits than its factorization.

22425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49 (or 44 counting only the distinct ones).

The product of its digits is 160, while the sum is 15.

The square root of 22425 is about 149.7497913187. The cubic root of 22425 is about 28.1996780809.

Adding to 22425 its reverse (52422), we get a palindrome (74847).

The spelling of 22425 in words is "twenty-two thousand, four hundred twenty-five".