22229561 has 2 divisors, whose sum is σ = 22229562. Its totient is φ = 22229560.

The previous prime is 22229539. The next prime is 22229567. The reversal of 22229561 is 16592222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17305600 + 4923961 = 4160^2 + 2219^2 .

It is a cyclic number.

It is not a de Polignac number, because 22229561 - 2⁶ = 22229497 is a prime.

It is not a weakly prime, because it can be changed into another prime (22229567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11114780 + 11114781.

It is an arithmetic number, because the mean of its divisors is an integer number (11114781).

Almost surely, 2^22229561 is an apocalyptic number.

It is an amenable number.

22229561 is a deficient number, since it is larger than the sum of its proper divisors (1).

22229561 is an equidigital number, since it uses as much as digits as its factorization.

22229561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 22229561 is about 4714.8235385855. The cubic root of 22229561 is about 281.1751671855.

The spelling of 22229561 in words is "twenty-two million, two hundred twenty-nine thousand, five hundred sixty-one".