22240457 has 2 divisors, whose sum is σ = 22240458. Its totient is φ = 22240456.

The previous prime is 22240433. The next prime is 22240499. The reversal of 22240457 is 75404222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21799561 + 440896 = 4669^2 + 664^2 .

It is a cyclic number.

It is not a de Polignac number, because 22240457 - 2⁸ = 22240201 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22240657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11120228 + 11120229.

It is an arithmetic number, because the mean of its divisors is an integer number (11120229).

Almost surely, 2^22240457 is an apocalyptic number.

It is an amenable number.

22240457 is a deficient number, since it is larger than the sum of its proper divisors (1).

22240457 is an equidigital number, since it uses as much as digits as its factorization.

22240457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 22240457 is about 4715.9789015643. The cubic root of 22240457 is about 281.2210997794.

Adding to 22240457 its reverse (75404222), we get a palindrome (97644679).

The spelling of 22240457 in words is "twenty-two million, two hundred forty thousand, four hundred fifty-seven".