22697225 has 18 divisors (see below), whose sum is σ = 28745370. Its totient is φ = 17776000.

The previous prime is 22697221. The next prime is 22697237. The reversal of 22697225 is 52279622.

It can be written as a sum of positive squares in 9 ways, for example, as 295936 + 22401289 = 544^2 + 4733^2 .

It is not a de Polignac number, because 22697225 - 2² = 22697221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22697221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 224675 + ... + 224775.

It is an arithmetic number, because the mean of its divisors is an integer number (1596965).

Almost surely, 2^22697225 is an apocalyptic number.

22697225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22697225 is a deficient number, since it is larger than the sum of its proper divisors (6048145).

22697225 is an equidigital number, since it uses as much as digits as its factorization.

22697225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301 (or 195 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 22697225 is about 4764.1604716886. The cubic root of 22697225 is about 283.1332805431.

It can be divided in two parts, 22697 and 225, that added together give a palindrome (22922).

The spelling of 22697225 in words is "twenty-two million, six hundred ninety-seven thousand, two hundred twenty-five".