22549661 has 2 divisors, whose sum is σ = 22549662. Its totient is φ = 22549660.

The previous prime is 22549621. The next prime is 22549669. The reversal of 22549661 is 16694522.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22146436 + 403225 = 4706^2 + 635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22549661 is a prime.

It is a super-2 number, since 2×22549661² = 1016974422429842, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22549669) 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, 11274830 + 11274831.

It is an arithmetic number, because the mean of its divisors is an integer number (11274831).

Almost surely, 2^22549661 is an apocalyptic number.

It is an amenable number.

22549661 is a deficient number, since it is larger than the sum of its proper divisors (1).

22549661 is an equidigital number, since it uses as much as digits as its factorization.

22549661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 22549661 is about 4748.6483339999. The cubic root of 22549661 is about 282.5183573316.

The spelling of 22549661 in words is "twenty-two million, five hundred forty-nine thousand, six hundred sixty-one".