22265257 has 12 divisors (see below), whose sum is σ = 27424980. Its totient is φ = 17961216.

The previous prime is 22265237. The next prime is 22265261. The reversal of 22265257 is 75256222.

It can be written as a sum of positive squares in 2 ways, for example, as 15808576 + 6456681 = 3976^2 + 2541^2 .

It is a de Polignac number, because none of the positive numbers 2^k-22265257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22265227) 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, 12532 + ... + 14197.

It is an arithmetic number, because the mean of its divisors is an integer number (2285415).

Almost surely, 2^22265257 is an apocalyptic number.

It is an amenable number.

22265257 is a deficient number, since it is larger than the sum of its proper divisors (5159723).

22265257 is a wasteful number, since it uses less digits than its factorization.

22265257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26760 (or 26753 counting only the distinct ones).

The product of its digits is 16800, while the sum is 31.

The square root of 22265257 is about 4718.6075276505. The cubic root of 22265257 is about 281.3255894274.

It can be divided in two parts, 22265 and 257, that added together give a palindrome (22522).

The spelling of 22265257 in words is "twenty-two million, two hundred sixty-five thousand, two hundred fifty-seven".