22447561 has 2 divisors, whose sum is σ = 22447562. Its totient is φ = 22447560.

The previous prime is 22447547. The next prime is 22447589. The reversal of 22447561 is 16574422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17065161 + 5382400 = 4131^2 + 2320^2 .

It is a cyclic number.

It is not a de Polignac number, because 22447561 - 2¹⁹ = 21923273 is a prime.

It is not a weakly prime, because it can be changed into another prime (22447501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11223780 + 11223781.

It is an arithmetic number, because the mean of its divisors is an integer number (11223781).

Almost surely, 2^22447561 is an apocalyptic number.

It is an amenable number.

22447561 is a deficient number, since it is larger than the sum of its proper divisors (1).

22447561 is an equidigital number, since it uses as much as digits as its factorization.

22447561 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 22447561 is about 4737.8857098921. The cubic root of 22447561 is about 282.0913181113.

The spelling of 22447561 in words is "twenty-two million, four hundred forty-seven thousand, five hundred sixty-one".