22230561 has 4 divisors (see below), whose sum is σ = 29640752. Its totient is φ = 14820372.

The previous prime is 22230529. The next prime is 22230583. The reversal of 22230561 is 16503222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 22230561 - 2⁵ = 22230529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22230661) 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 in 3 ways as a sum of consecutive naturals, for example, 3705091 + ... + 3705096.

It is an arithmetic number, because the mean of its divisors is an integer number (7410188).

Almost surely, 2^22230561 is an apocalyptic number.

It is an amenable number.

22230561 is a deficient number, since it is larger than the sum of its proper divisors (7410191).

22230561 is an equidigital number, since it uses as much as digits as its factorization.

22230561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7410190.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 22230561 is about 4714.9295859005. The cubic root of 22230561 is about 281.1793833574.

Adding to 22230561 its reverse (16503222), we get a palindrome (38733783).

It can be divided in two parts, 22230 and 561, that added together give a triangular number (22791 = T₂₁₃).

The spelling of 22230561 in words is "twenty-two million, two hundred thirty thousand, five hundred sixty-one".