22189257 has 6 divisors (see below), whose sum is σ = 32051162. Its totient is φ = 14792832.

The previous prime is 22189253. The next prime is 22189291. The reversal of 22189257 is 75298122.

It can be written as a sum of positive squares in only one way, i.e., 21566736 + 622521 = 4644^2 + 789^2 .

It is not a de Polignac number, because 22189257 - 2² = 22189253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22189253) 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 5 ways as a sum of consecutive naturals, for example, 1232728 + ... + 1232745.

Almost surely, 2^22189257 is an apocalyptic number.

It is an amenable number.

22189257 is a deficient number, since it is larger than the sum of its proper divisors (9861905).

22189257 is a wasteful number, since it uses less digits than its factorization.

22189257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2465479 (or 2465476 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 22189257 is about 4710.5474204173. The cubic root of 22189257 is about 281.0051332421.

The spelling of 22189257 in words is "twenty-two million, one hundred eighty-nine thousand, two hundred fifty-seven".