22757681 has 2 divisors, whose sum is σ = 22757682. Its totient is φ = 22757680.

The previous prime is 22757671. The next prime is 22757711. The reversal of 22757681 is 18675722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14318656 + 8439025 = 3784^2 + 2905^2 .

It is a cyclic number.

It is not a de Polignac number, because 22757681 - 2¹⁴ = 22741297 is a prime.

It is a super-2 number, since 2×22757681² = 1035824088995522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22757641) 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 as a sum of consecutive naturals, namely, 11378840 + 11378841.

It is an arithmetic number, because the mean of its divisors is an integer number (11378841).

Almost surely, 2^22757681 is an apocalyptic number.

It is an amenable number.

22757681 is a deficient number, since it is larger than the sum of its proper divisors (1).

22757681 is an equidigital number, since it uses as much as digits as its factorization.

22757681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 38.

The square root of 22757681 is about 4770.5011267161. The cubic root of 22757681 is about 283.3844409152.

The spelling of 22757681 in words is "twenty-two million, seven hundred fifty-seven thousand, six hundred eighty-one".