11228561 has 2 divisors, whose sum is σ = 11228562. Its totient is φ = 11228560.

The previous prime is 11228543. The next prime is 11228593. The reversal of 11228561 is 16582211.

11228561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11182336 + 46225 = 3344^2 + 215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11228561 is a prime.

It is equal to p₇₄₀₆₁₈ and since 11228561 and 740618 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11228561.

It is not a weakly prime, because it can be changed into another prime (11228521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5614280 + 5614281.

It is an arithmetic number, because the mean of its divisors is an integer number (5614281).

Almost surely, 2^11228561 is an apocalyptic number.

It is an amenable number.

11228561 is a deficient number, since it is larger than the sum of its proper divisors (1).

11228561 is an equidigital number, since it uses as much as digits as its factorization.

11228561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 26.

The square root of 11228561 is about 3350.9045047569. The cubic root of 11228561 is about 223.9278107621.

The spelling of 11228561 in words is "eleven million, two hundred twenty-eight thousand, five hundred sixty-one".