22225745 has 8 divisors (see below), whose sum is σ = 27590760. Its totient is φ = 17167360.

The previous prime is 22225739. The next prime is 22225747. The reversal of 22225745 is 54752222.

22225745 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in 4 ways, for example, as 8690704 + 13535041 = 2948^2 + 3679^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22225745 - 2¹⁰ = 22224721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (22225747) 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 7 ways as a sum of consecutive naturals, for example, 76496 + ... + 76785.

It is an arithmetic number, because the mean of its divisors is an integer number (3448845).

Almost surely, 2^22225745 is an apocalyptic number.

It is an amenable number.

22225745 is a deficient number, since it is larger than the sum of its proper divisors (5365015).

22225745 is a wasteful number, since it uses less digits than its factorization.

22225745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153315.

The product of its digits is 11200, while the sum is 29.

The square root of 22225745 is about 4714.4188401117. The cubic root of 22225745 is about 281.1590771115.

Adding to 22225745 its reverse (54752222), we get a palindrome (76977967).

The spelling of 22225745 in words is "twenty-two million, two hundred twenty-five thousand, seven hundred forty-five".