22235561 has 2 divisors, whose sum is σ = 22235562. Its totient is φ = 22235560.

The previous prime is 22235533. The next prime is 22235569. The reversal of 22235561 is 16553222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19891600 + 2343961 = 4460^2 + 1531^2 .

It is a cyclic number.

It is not a de Polignac number, because 22235561 - 2⁶ = 22235497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22235561.

It is not a weakly prime, because it can be changed into another prime (22235569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11117780 + 11117781.

It is an arithmetic number, because the mean of its divisors is an integer number (11117781).

Almost surely, 2^22235561 is an apocalyptic number.

It is an amenable number.

22235561 is a deficient number, since it is larger than the sum of its proper divisors (1).

22235561 is an equidigital number, since it uses as much as digits as its factorization.

22235561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 26.

The square root of 22235561 is about 4715.4597867016. The cubic root of 22235561 is about 281.2004623205.

Adding to 22235561 its reverse (16553222), we get a palindrome (38788783).

The spelling of 22235561 in words is "twenty-two million, two hundred thirty-five thousand, five hundred sixty-one".