22681457 has 2 divisors, whose sum is σ = 22681458. Its totient is φ = 22681456.

The previous prime is 22681433. The next prime is 22681489. The reversal of 22681457 is 75418622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18011536 + 4669921 = 4244^2 + 2161^2 .

It is a cyclic number.

It is not a de Polignac number, because 22681457 - 2¹⁶ = 22615921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22681357) 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, 11340728 + 11340729.

It is an arithmetic number, because the mean of its divisors is an integer number (11340729).

Almost surely, 2^22681457 is an apocalyptic number.

It is an amenable number.

22681457 is a deficient number, since it is larger than the sum of its proper divisors (1).

22681457 is an equidigital number, since it uses as much as digits as its factorization.

22681457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 35.

The square root of 22681457 is about 4762.5053280810. The cubic root of 22681457 is about 283.0677001355.

The spelling of 22681457 in words is "twenty-two million, six hundred eighty-one thousand, four hundred fifty-seven".