22144657 has 2 divisors, whose sum is σ = 22144658. Its totient is φ = 22144656.

The previous prime is 22144651. The next prime is 22144679. The reversal of 22144657 is 75644122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11128896 + 11015761 = 3336^2 + 3319^2 .

It is a cyclic number.

It is not a de Polignac number, because 22144657 - 2¹¹ = 22142609 is a prime.

It is a plaindrome in base 11.

It is not a weakly prime, because it can be changed into another prime (22144651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11072328 + 11072329.

It is an arithmetic number, because the mean of its divisors is an integer number (11072329).

Almost surely, 2^22144657 is an apocalyptic number.

It is an amenable number.

22144657 is a deficient number, since it is larger than the sum of its proper divisors (1).

22144657 is an equidigital number, since it uses as much as digits as its factorization.

22144657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 31.

The square root of 22144657 is about 4705.8109821794. The cubic root of 22144657 is about 280.8167352371.

Adding to 22144657 its reverse (75644122), we get a palindrome (97788779).

It can be divided in two parts, 22144 and 657, that added together give a square (22801 = 151²).

The spelling of 22144657 in words is "twenty-two million, one hundred forty-four thousand, six hundred fifty-seven".