22254665 has 4 divisors (see below), whose sum is σ = 26705604. Its totient is φ = 17803728.

The previous prime is 22254619. The next prime is 22254667. The reversal of 22254665 is 56645222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56645222 = 2 ⋅28322611.

It can be written as a sum of positive squares in 2 ways, for example, as 9388096 + 12866569 = 3064^2 + 3587^2 .

It is a cyclic number.

It is not a de Polignac number, because 22254665 - 2⁶ = 22254601 is a prime.

It is a super-2 number, since 2×22254665² = 990540228524450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22254667) 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 3 ways as a sum of consecutive naturals, for example, 2225462 + ... + 2225471.

It is an arithmetic number, because the mean of its divisors is an integer number (6676401).

Almost surely, 2^22254665 is an apocalyptic number.

It is an amenable number.

22254665 is a deficient number, since it is larger than the sum of its proper divisors (4450939).

22254665 is an equidigital number, since it uses as much as digits as its factorization.

22254665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4450938.

The product of its digits is 28800, while the sum is 32.

The square root of 22254665 is about 4717.4850291230. The cubic root of 22254665 is about 281.2809717332.

Adding to 22254665 its reverse (56645222), we get a palindrome (78899887).

The spelling of 22254665 in words is "twenty-two million, two hundred fifty-four thousand, six hundred sixty-five".